Syrian forces breach Raqqa's Old Wall in IS fight bbc.com

US-backed Syrian forces have breached the wall at Raqqa's Old City as they try to retake the city from so-called Islamic State, the US military says.
It says the coalition helped the advance of the Syrian Democratic Forces (SDF) by firing on two sections of the historic Rafiqah Wall.
The SDF, supported by US-led coalition air strikes, has spent months encircling the city.
IS seized Raqqa in 2014, proclaiming it the capital of a "caliphate".
The city is an important hub for the jihadist group's operations, and is reportedly defended by up to 4,000 fighters.