US President Donald Trump has approved supplying weapons to Kurdish forces fighting the Islamic State in Syria, the Pentagon says. The Kurdish YPG leading the Syrian Democratic Forces (SDF) would be equipped to help drive ISIS from its stronghold, Raqqa, a spokeswoman said. The US was "keenly aware" of Turkey's concerns about such a move, she added. The SDF, which comprises Kurdish and Arab militias, is already being supported by elite US forces and air strikes from a US-led coalition. The group is currently battling for control of the city of Tabqa, an ISIS command centre just 50km (30 miles) from Raqqa. The equipment would include ammunition, small arms, machine guns, heavy machine guns, construction equipment such as bulldozers and armored vehicles. The Pentagon ource added that the US would "seek to recover" the equipment afterwards.