The top emergency relief official at the United Nations expressed new alarm on Tuesday at the humanitarian crisis caused by Syria’s civil war, telling the Security Council that despite some modest progress, both the government and insurgent sides were still impeding urgent deliveries of food and medicine to millions of desperate civilians. Speaking to reporters after a closed briefing for Security Council diplomats, the official — Valerie Amos, the under secretary general and emergency relief coordinator — said that the Syrian authorities had been permitting aid convoys from Lebanon, Jordan and Iraq, but had refused to allow any from Turkey, which the Syrian government has accused of abetting the insurgency. Ms. Amos said that nine aid convoys had entered Syria over the past month, three times as many as in earlier months, but “this is still far too few to meet the needs of the millions […]