US and allied bombers, fighter jets and robotic drones hit the IS group over a 24 hour period with four strikes south of the town, destroying an armored personnel carrier, three vehicles and an artillery piece, Central Command said in a statement.

A fifth raid southwest of Kobane destroyed an IS armed vehicle and a sixth strike decimated an artillery cannon on the "southern edge" of the town, it said.

Coalition warplanes also bombed IS positions with two strikes northwest of Raqa, hitting a training camp, and a raid in Deir Ezzor, destroying a tank.

Aircraft from the United Arab Emirates, one of five Arab countries involved in the air campaign, also took part in the latest strikes along with American planes, said Central Command, which oversees US forces in the Middle East.

The IS group has been closing in on Kobane for days but Kurdish militia -- backed by US-led air power -- have reportedly managed to roll back IS militants out of several neighborhoods amid heavy fighting overnight.

The Syrian Observatory for Human Rights, a Britain-based monitoring group, also said IS fighters had withdrawn overnight from several areas and were no longer inside the western part of Kobane.

Coalition forces also renewed air strikes on IS militants Iraq on Tuesday and Wednesday, with five bombing raids by fighter jets and unmanned drones, Central Command said.

The operation included three strikes west of Baghdad, where Iraqi government forces are under pressure from IS fighters, it said.

One raid east of Fallujah destroyed an IS checkpoint and armed vehicle, a strike in western Ramadi destroyed three IS buildings and two anti-aircraft artillery pieces and a bombing run northwest of Ramadi destroyed an IS checkpoint, it said.

Coalition forces, which included British and Dutch warplances, also bombed IS targets near Mount Sinjar in two strikes.

The United States launched its air campaign against the IS group on August 8 in Iraq and extended it into Syria on September 23.