Opposition-controlled parts of Syria's battered northern city Aleppo came under total siege on Sunday, after government forces severed the last route out of the east.

Beleaguered rebels have failed to thwart a major Russian-backed army offensive around Aleppo city, which has been devastated by the country's
five-year conflict.

On Sunday, regime fighters descended on the Castello Road and fully cut it, said Rami Abdel Rahman, head of the Britain-based Syrian Observatory for Human Rights.

"The eastern neighbourhoods are now completely besieged," he told AFP.

(AFP)