but ahmed asiri is saying that isn't a must. i don't feel that that must happen.onger this goes on inevitably, though i suppose the likelihood of that happening rises. >> it will all depend on what happens on the ground. because preferably, for the saudi-led coalition, they don't want boots on the ground. what they want to do is using their air power to force the houthis to retreat and breaking this alliance between the houthis and the former president, abdullah saleh who controls a large part of the army. if they manage to do this they will not need to put boots on the ground. but if the advance of the houthis continue they need to start with special forces to do specific missions and eventually, what the saudi spokesman said possibility of some sort of ground invasion. although this would be a very risky step because the risk of being caught in a quagmire. >> mohammed thanks very much. >>> let's get the latest now in our series that looks at the success or otherwise of the truce in eastern ukraine, the deal that was signed in minsk in february. our correspondent

we have the saudi coalition spokesman ahmed asiri addressing the media and what has been regular events in yemen. >> our targets are clear and we're working by the grace of god to hit them directly. what i would like to point out at the beginning of the today's briefing is that before i the operation of the strikes under way to achieve all the goals and the targets laid down for the campaign. and this will be demonstrateed today's presentation including the video clips. you have noticed over the past days namely yesterday that you were furious to know the development in aden during yesterday's briefing. some inquired why we didn't speak about the fall of the presidential palace in the hands of the houthis. our main concern was the ultimate outcome. we shouldn't respond to each and every action. we should leave the party to operate and negotiate the action. otherwise it would be well planned military campaign. we always depend on preemptive strikes laid down objective goals and targets work on hitting them, and leave it to the enemy or the other party to act in the action. this is exactl