The UN Office for the Coordination of Humanitarian Affairs (OCHA) - the conditions proposed by Syria “unacceptable”, but fears remain that a compromise may have to be made. Charles Lister, of the US thinktank the Middle East Institute, said the Russian veto had killed the "tried and tested mechanism" for cross-border aid, and that two members of the UN security council described the Assad’s regime’s offer as “the de facto reality”.