US Secretary of State John Kerry has told the BBC that Russia needs to be more serious about getting the Syrian government to abide by the terms of the ceasefire.

Six days after the start of a fragile truce, air strikes are reported to have targeted anti-government groups in Aleppo.

The deal, agreed by the United States and Russia, is also being threatened by tensions over a US-backed strike that killed more than 60 Syrian troops.

"Russia needs to stop Syrian President Bashar Assad from bombing the opposition and force him to allow aid into besieged areas."

"We call on Russia to stop the grandstanding, stop the showboating and get the humanitarian assistance going."

Source: MENA