correspondent amy kellogg has more tonight. >> reporter: italian police have busted an al qaeda cell some directly implicated in an incredible bloodshed, an attack on a market that killed 100 people in 2009. pakistan remains their main target. they thought attacking it would cause islamabad to withdraw its supports for u.s. troops in afghanistan. they may have planned a suicide attempt on the van can in 2010 that they never carried out. the vatican has been quick to play down the suggestion but acknowledge these are tough times. >> translator: we are all exposed. in a certain sense, we are all scared because we don't know what could happen but it seems to me the pope is very calm. >> reporter: the suspect, whose italian base is cardenia, two of them are believed to have guarded before going to italy. they produced bogus documents and job contracts and by collecting cash for an apparently legitimate muslim charity, uncovering significant terror cell was a shock for italians. the country, however, has been on a high state of alert. >> we've never seen so many troops and people from the

amy kellogg has details. >> reporter: as many as 900 refugees are believed to have drown sunday morning. reportedly hundreds had been locked in the hold by the human traffickers who arranged these dangerous voyages. they had already been drowning at nine times the rate as last year but the prime minister of malta called the weekend's tragedy a game-changer. >> translator: there is a new understanding that if europe does not cooperate and work as a team, it will mean that europe will be judged. history will judge europe in a very bad way. the way that europe was judged for closing its eyes over genocide. now a very bad event not that long ago. >> reporter: and in greece, another ship washed up and three died including a baby, as two other boats put out rescue calls that european boaters had trouble meeting. they discussed responses to the crisis. >> that response has got to include targeting the criminals who are managing this traffic in human suffering. we've got to tackle them. we've got to work upstream in the countries from which these people are coming. we are determined to put an e

amy kellogg has the very latest from london. amy. >> hi, david. oh, it is so horrible. italy has been arresting some of the members of or alleged members of these smuggling gangs today. on top of it all, they have released some of the conversations from wiretaps they have picked up from some of these men who have been in prison before. the cynical conversations, david, are unbelievable. referring to these migrants as suckers for paying thousands of dollars they do to make that very dangerous journey across the med. some of these smugglers make as much as a million dollars for some of these hauls. europe meanwhile is desperate about what to do about this human crisis. it is becoming worse bit day. as many as nine hundred may have died when a boatloaded up with migrants, capsized and sank in the wee hours of sunday. here are some of the bodies arriving in malta for burial. apparently migrants on board raced to one side of the boat when they saw another ship approaching. they wanted to get the ship's attention. the boat capsized and reportedly there were hundreds locked in

amy kellogg has details. >> reporter: as many as 900 refugees are believed to have drown sunday morningreportedly hundreds had been locked in the hold by the human traffickers who arranged these dangerous voyages. they had already been drowning at nine times the rate as last year but the prime minister of malta called the weekend's tragedy a game-changer. >> translator: there is a new understanding that if europe does not cooperate and work as a team, it will mean that europe will be judged. history will judge europe in a very bad way. the way that europe was judged for closing its eyes over genocide. now a very bad event not that long ago. >> reporter: and in greece, another ship washed up and three died including a baby, as two other boats put out rescue calls that european boaters had trouble meeting. they discussed responses to the crisis. >> that response has got to include targeting the criminals who are managing this traffic in human suffering. we've got to tackle them. we've got to work upstream in the countries from which these people are coming. we are determined to put an end

amy kellogg live in london. what is going on there amy?> reporter: yeah, bill the terror threat level in paris has been at its highest since january since the attacks on "charlie hebdo" and the kosher supermarket happened. the army is out in force in unprecedented numbers guarding sensitive sites, bill. because the interior minister said the terror threat level has has unamplified and unprecedented nature. jihadist wrecked his supposed plot shootings himself by mistake. he said this is the first time christians were targeted specifically by jihadists in france. over 1500 were identified involvement in terror networks. 440 actually made their way to syria. after the attacks on "charlie hebdo" and the kobe kosher market, the security around synagogues and mosques were beefed up but not around churches. he is believed to have killed this 32-year-old fitness ininstructor who came to paris to do a pilates course. she was probably in the wrong place at wrong time. he wanted to steal her car. it was mystery why she was the actual victim here. bil

senior correspondent amy kellogg has the horrifying details. >> it's not just traffickers that can be cruel. 15 muslim men from different parts of africa are charged with throwing 12 christians overboard to their death. they started praying to god when their raft started to deflate. a muslim asked why not allah and that's when the fight broke out. >> the problem is not of our region. it's a problem of human dignity. we are absolutely committed to solving this problem and i am confident that it will become a priority that we agree to resolve. >> reporter: italy already overwhelmed by the steady stream of refugees making the 200-mile trip from libya has been on edge since isis gained a hold on libya. the chaos is hastening the desperate exodus of people from all over africa and the middle east through libya. these people were caught in another tragedy. a gas explosion in a holding facility badly injured many. their handlers forced them onto boats. >> we've seen severe burns but they are usually due to the condition onboard the boat, nothing as bad as this. >> 10,000 people attempted to

amy kellogg is live with the latest out of our loan bureau. >> reporter: well, that death toll is officially15, but one of the al-shabaab militants called a local news agency and said he was looking at lots of christian bodies around so that death toll is very likely to go higher. also in that phone call the al-shabaab militant said they were targeting the university because some of its students had been doing missionary work jenna, not of a muslim nature. but what we do know about the university in northeastern kenya is that it's the only university in the region where young people can get a properly-certified degree so it is mixed. all reports we are getting is that it is the christian students who are being singled out. that said, the five or six gunmen who stormed the university before dawn shot at students indiscriminately as well. now security services are having a very difficult time right now getting to the one remaining dorm where the hostages are being held because some of the militants have actually taken to rooftops, and they are sniping at police below. in this comes just a week

amy kellogg live from london. amy what is going on there?s a synchronized attack, multimedia synchronized attack and being called unprecedented because isis has targeted websites before but they have never managed to manipulate tv stations. late last night they took 11 of tv 5 monde's stations to black. they took complete control of their social media. this was the message that you could see on the tv screens, telling president francois hollande that he made a mistake taking on isis. that is why the french got their quote, january gift of "charlie hebdo" and the attack on the kosher market. on the website the message was i am is. it called itself the cyber caliphate. they posted images of i.d. cards they claimed was soldiers involved in the isis with mention of soldiers to say away from is, quote, that you have a chance to save your families. tv 5 world claims to be one of the most accessible channels internationally. it is seen in 200 different countries. france likes to call its international cultural station. around 2:00 a.m. the network