GENEVA- Syrian authorities have detained 336 men who left Homs and are still questioning most of them without direct supervision by any neutral third party, the United Nations said on Tuesday.The men, deemed to be of fighting age by the Syrian authorities, were among 1,151 who left the besieged rebel-held Old City of Homs during an agreed ceasefire that was extended for a second three-day period on Monday.Forty-one of the men have been released, but the rest are being questioned in a school, under the "general monitoring" of U.N. protection staff from the U.N. refugee agency UNHCR and the U.N. children's agency UNICEF, UNHCR spokeswoman Melissa Fleming told a briefing in Geneva."We're in the facility, we know every person that is there. We are speaking to them separately themselves. But these are interviews that the U.N. is not necessarily privy to. These are security screening interviews," Fleming said.