Rebel forces have entered parts of Syria's second-largest city, Aleppo, a monitoring group says, in the biggest offensive against the government in years. The UK-based group says fighters set off two car bombs before advancing into neighbourhoods, without giving further details.

Syrian insurgents have breached Syria’s second largest city, Aleppo, after blowing up two car bombs and were clashing with government forces on Friday, according to a Syria war monitor and fighters.

Syrian insurgents have breached Syria's city of Aleppo after blowing up 2 car bombs, activists and fighters say