US-led forces have carried out air strikes on Islamic State (IS) militants battling Kurdish fighters around the northern Syrian border town of Kobane.
A BBC correspondent saw explosions outside the town in the morning.
At least 10 people were killed overnight, Syrian activists said, as the jihadists moved to within 2 to 3km (1.2-1.9 miles) of Kobane.
Tens of thousands of people have fled across the border into Turkey since IS launched an offensive two weeks ago.
The jihadists' advance has put pressure on the Turkish government to take a more significant role in the US-led coalition formed to combat IS.