Washington 21 Sep (ANA) - The US has said it holds Russia responsible for a deadly attack on an aid convoy near the Syrian city of Aleppo on Monday. The White House has called it an "enormous humanitarian tragedy". Meanwhile, US officials have told the BBC that two Russian war planes were responsible for the attack. Russia strongly denies involvement of its own or Syrian planes, and says the incident was caused by fire on the ground and not by an air strike. "There are no craters and the exterior of the vehicles do not have the kind of damage consistent with blasts caused by bombs dropped from the air," a statement from the defence ministry said. And the country's foreign ministry spokeswoman said the US government had "no facts" to support its claim, adding: "We have nothing to do with this situation." Separately, an airstrike hit a medical centre near Aleppo on Tuesday night local time, killing four medics working for the Union of Medical Care and Relief Organizations (UOSSM), the group said. The attack on the rebel-held town of Khan Touman also killed at least nine rebel fighters and was carried out by either Syrian or Russian warplanes, UK-based monitoring group the Syrian Observatory for Human Rights said. The rebels were from Jaish al-Fatah, an Islamist group not officially part of the Western-backed alliance but one that works alongside the Free Syrian Army, the BBC's James Longman in Beirut reports. One nurse remains in a critical condition and the medical centre was completely destroyed, UOSSM said in a statement (in French), adding that more victims are feared buried under the rubble. Speaking earlier about Monday's attack on the aid convoy, US officials, speaking on condition of anonymity, said two Russian SU-24 attack aircraft were in the sky above the convoy at the precise moment it was hit in Urum al-Kubra. The strike, they added, was too sophisticated to have been carried out by the Syrian army.(ANA)

FA/ANA/21 September 2016--------