scott, the identity of khaled masoud seems to have taken the british security services by surprise. he was investigated years ago for peripheral links to extremism but seemed since then to have slid right off the radar. >> pelley: liz palmer at the palace of westminster in london for us tonight. liz, thank you. in israel today, a jewish teenager who holds both u.s. and israeli citizenship was arrested in connection with a wave of bomb threats phoned in to jewish community centers around the world. anna werner has his story. >> reporter: the f.b.i. worked with israeli authorities to arrest this 18-year-old man, who covered his face as he appeared briefly in court. a u.s. law enforcement official tells cbs news he is believed to be responsible for most of the 160-plus bomb threats phoned into jewish centers in the u.s., australia, new zealand, and canada. israeli police spokesman miblgy roenfeld. >> we're looking to see the identification of the suspect himself, his from file, what were the motives behind him carrying out those threats. >> reporter: the source says agents now believe

other people. >> 52-year-old british born kahled masoud. >> and ali arouzi is in london.w? >> reporter: a little more about the american victim. we hear he was here on his 25th anniversary with his wife visiting europe. his wife was also injured in the attack, she's in hospital here in london suffering from some very serious injuries. the mood here, ali, is one of shock and people are trying to come to terms with what's happened here. this is a city that's no strange tore terrori to terrorism but it's still shocking that such a brazen attack took part here yesterday. a lot of buildings have their flags at half staff and today done is a hive of police activity, screeching sirens, police cars are rushing through the city, the air is buzzing with police helicopters, the thames river has a heavily armed policemen go up and down the river. but people are not letting it affect their lives, it back to business here in london. >> thanks very for your reporting, ali arouzi, in london. right now president trump is meeting with the house geo caucus. we'll bring you the latest when i

sarah: joining me in the city is at the iraqi journalist messier -- a mere masoud he. -- amir, you areot able to embed intrusive this time, why? >> the situation in the western part of the city is more complicated than the ease part. i.s. has been shooting journalists and makes more action in the media. i.s. is using the smaller drones , hobbyist to drones they develop to send bombs ever the iraqi troops as they cannot guarantee our safety. that is 40 kilometers south of mosul, i saw the tragedy of some amylase -- some families, they lost their fathers, mothers, children, became alone. it is a quite complicated the tuition in -- complicated situation in mosul. sarah: what do the refugees >> they told us they could not have the access to the iraqi treat side because isis closed this corridor and if they try another area i.s. will shoot them. a woman told me that her husband is cold from a sniper because he tried to take his family away from the fire. sarah: civilian death are becoming increasingly concerning to the international community. amnesty international says that of civilians ha

police have now identified the attacker as 52-year-old khalid masoud born in kent. police say he had a criminal record but there was no indication he was planning a terrorist attack. >> focus on his motivation, his preparation and his associates. >> hear, hear. >> reporter: parliament was back in session thursday where the prime minister delivered a defiant message. >> we are not agrade and our resolve will never -- we are not afraid and our resolve will never waiver in the face of terrorism. >> reporter: the area around parliament is a crime scene and it's closed but the bridge where the terror began is reopened. security camera video shows the attacker speeding across westminster bridge mowing down pedestrians. two people died and more than 2 dozen others are injured. the suspect then crashed into a fence near parliament before fatally stabbing officer palmer. flowers and a photo of palmer were placed on the ground in tribute to the fallen officer. teri okita, cbs news, london. >>> and a live look in london right now where it's just after 7:00. crowds gathering at

but first, more details have emerged about khalid masoud, the 52—year—old man who drove a car into pedestriansr bridge on wednesday before fatally stabbing a policeman guarding the houses of parliament. it's understood that khalid masood was born under the name adrian elms. police have also confirmed that a 75—year—old man, injured on westminster bridge, has died from his injuries. his identity has not yet been released. greg dawson has the latest. central london, salinity is thousands came together contribute to victims of wednesday ‘s attack. we wa nt to victims of wednesday ‘s attack. we want the world to know that we are free and we relish our freedom and we are proud to be british, we are proud to be londoners and we hope we are an open society who will welcome everybody here. a few hundred yards from westminster bridge, flowers are laid outside the headquarters of london's metropolitan police in memory of keith palmer, the officer stabbed to death trying to protect parliament. inside the building, detectives continue to piece together information about the man who carried out the attack.

it is a dark painting and masoud one in tampa today's ago i said let me show you repainting. i said i am no longer the commander in chief. [laughter] you can tell me the truth. he liked it. [laughter] i think because it captured the in which that he felt so i wish i could repeat that. but the book is out. >> that question is which of the of wounded warriors was the toughest? >> they are all tough in a way. when news think about it because everyone of the men and women, have very physical wounds of war and all of them has dramatic brain injury. so to have such great pride. i am a baby boomer which means we and all more. a lot of people did not understand minnesota defense -- when the vet came home in a blizzard despicable so they've were attacked and i made it clear real defend the country. it is utterly different attitude and to be a high honor. so i thought about the integrity and the courage of those will into volunteer. so i had a lot of pride to paint them. i guess the toughest was me with a the first lieutenant to lose your lady in combat than wednesday bronze in the oly

the westminster attacker is now officially being called by his muslim name khalid masoud. just three minutes before he drove and used his vehicle and knife to kill four people, he sent a tes message to someone using the what's app message service owned by facebook. authorities don't know who he was communicating with. unlike a normal text message or social media account, what'sapp uses something called end to end encryption, which means only the sender and the recipient have access to the message. no third parties. whatsapp said private communication is part of its core beliefs. in fact, company said the service is so secure that not even company technicians can access the messages. but the head of the u.k.'s homeland security department said encrypted messaging sites are helping the terrorists. watch. >> it is completely unacceptable. there should be no place for terrorists to hide. we need to make sure that organizations like whatsapp and plenty of others like that don't provide a secret place for terrorists to communicate with each other. >> reporter: the homeland secre