Islamic State hits back, aided by power vacuum in Iraq and Syria

Islamic State is far from the formidable force it once was, but militant cells often operating independently have survived across a swathe of northern Iraq and northeastern Syria

Yousif Ibrahim no longer travels by night along the roads around his hometown of Jalawla in northeastern Iraq. He fears getting caught up in attacks by Islamic State.

"The police and army don't come into our area much anymore.

If they do, they get shot at by militants," said the 25-year-old, who sells fish for a living in a nearby market.

Nearly three years after the group lost its final enclave, Islamic State fighters are re-emerging as a deadly threat, aided by the lack of central control in many areas, according to a dozen security officials, local leaders and residents