(Reuters) – The United Nations condemned air raids on five hospitals and two humanitarian warehouses in Idlib, Syria, this week and called for setting up a system so warring sides would protect civilians and medical facilities near “terrorist” groups. Jan Egeland, U.N. humanitarian adviser on Syria, said it was not clear who had carried out the attacks, but said it was part of an escalating trend to attack “humanitarian lifelines” including hospitals, ambulances and health workers.