Aid worker says situation out of control as migrants locked in stadium on KosMore than 2,000 refugees in Kos have been locked in a stadium, after riot police struggled to contain crowds of recent migrant arrivals rounded up from makeshift camps around the Greek island.Migrants and refugees are pushed as riot police try to maintain an orderly line during a registration procedureat the national stadium. hotograph! Alkis Konstantinidis"#eutersPatrick Kingsley Migration correspondent, and Jon Henley in Athens$ednesday %2 August 20%&'n $ednesday afternoon, after being locked inside for about %( hours, the mostly )yrian and Afghan refugees were fainting at a rate of four each hour,aid workers said.About a thousand of the refugees are trapped inside a playground within the stadium comple*, with no access to water or shade. A further %,&00 are housed in a separate section of the stadium, with some protection from the sun.+onstance ,heisen, a team leader for M-decins sans .ronti/res, which was providing medical care at the stadium, told the Guardian! 0$e have unconscious people coming out of the playground area, being carried by their friends and family, every %& minutes. 1t is absolutely out of control. 2obody understands the sense behind it, or if there is any 3sense4 at all.5'ne of the migrants su6ered an epileptic sei7ure, the aid group said.,he migrants were originally locked inside on ,uesday night ostensibly to beregistered. 8ut, according to M)., 9ust three police o:cers were there to carry out the registration, slowing the process down and e*acerbating tensions.At one point the police used a sonic e*plosion to maintain order, and the M). team withdrew for safety reasons. 01t was becoming a bit uncontrollable, the situation, and there was a complete lack of coordination.1t was 9ust the police there, no ;2ulia Kourafa, a spokeswoman for M). at the stadium.M). returned early the ne*t morning to provide medical assistance, but the refugees remained locked inside. ?ittle, if any, food or water had been supplied by the Greek authorities and refugees continued to faint.Kourafa added! 0,his is the @rst time we=ve seen this in Greece A people locked inside a stadium and controlled by riot police. $e=re talking about mothers with children and elderly people. ,hey=ve been locked in there after many hours in the sun.5,ensions were also rising fast on several other eastern Greek islands, where more than %20,000 refugees have arrived since the start of the year A up from around B0,000 during the whole of 20%C.