US-led forces have continued air strikes against Islamic State (IS) militants near the besieged Syrian Kurdish border town of Kobane.

A senior local official said IS had been pushed back towards the edge of the town as a result of the strikes and advances by the town's defenders.

Earlier reports said the militants had controlled almost a third of Kobane, on the Turkish-Syrian border.

Turkey has ruled out a ground operation on its own against IS in Syria.

Foreign Minister Mevlut Cavusoglu renewed calls for the creation of a no-fly zone along the Syrian side of the border during talks in Ankara with new Nato chief Jens Stoltenberg.

Turkey - a Nato member - also wants co-ordinated action against the government of President Bashar al-Assad.

This would include preventing Syrian government aircraft from flying near the Turkish border. Turkey fears that Mr Assad's forces would be the main beneficiaries of an IS retreat.

It also wants to ease the influx of refugees into Turkey, and is under intense pressure to do more to help the Kurdish forces in Kobane.

The UN's special envoy in Syria, Steffan de Mistura, said on Wednesday that everything possible had to be done to save Kobane, and the town's fall would threaten Turkey itself.

The Turkish government won parliamentary authorisation for possible military action last week.
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At the scene: Wael el Hajjar, BBC News, Turkey-Syria border

We're standing on a hill in Mursitpinar, Turkey, overlooking Kobane. The east of the city is shrouded in smoke.

There have been reports that IS is setting fire to buildings to create a screen from the aeroplanes we hear almost constantly overhead. Those planes continue to strike to the west of the city.

Towers of black smoke have been burning for the past few hours on the top of Mistanour hill, which is under IS control.

Kurdish sources inside Kobane say that the YPG (Syrian Kurdish Popular Protection Units) have advanced in the east and that a group of Free Syrian Army fighters moved behind IS lines causing heavy losses.

But the big black IS flag still flies on a small hill and a building in the far east of Kobane.

The motion provides a legal framework for the Turkish military to launch incursions into Syria and Iraq against militants who threaten Turkey. It also allows for foreign troops to be stationed in Turkey as part of the same campaign.

But Turkey remains wary of getting involved, partly because it is concerned about arming the Kurdish forces who are fighting the militants. Turkey has fought a long civil war with its Kurdish minority.

Pro-Kurdish protesters demanding Turkish intervention have clashed with police in several cities over recent days, with 20 people killed.
'Crazy without sleep'

After overnight fighting, monitoring group the Syrian Observatory for Human Rights, quoting "reliable sources", said IS controlled a third of the town and was advancing towards the centre from eastern districts.

But US and Kurdish reports suggested the defenders still controlled most of the town and were holding out.

A local commander told the BBC his fighters were "going crazy without sleep", but only 20% of the town was under IS control.

Senior local official Idris Nassan told the BBC: "Air strikes and special operations of the YPG pushed [IS] back and now they are not controlling any more the one-third of Kobane [sic]."

"They are controlling some houses in the east and south-eastern sides of Kobane."

Air strikes continued overnight and into Thursday morning. US Central Command confirmed that five had been carried out south of Kobane on Wednesday and Thursday.

BBC