US-led coalition warplanes have struck an oil refinery controlled by the Islamic State group inside Syria, residents of a Turkish border town said.

The US-led coalition attacking Islamic State in Syria has launched air strikes on its positions including wheat silos in the country's east, activists said today.

The Gulf nation of Qatar has hit back at suggestions that it supports the Islamic State extremist group, saying that “determined, collective action” is needed to end sectarian violence gripping Iraq and Syria.