Islamic extremists in Nigeria have seized Chibok, forcing thousands of residents to flee from the northeast town from which the insurgents kidnapped nearly 300 schoolgirls in April, a local official said Friday.

The insurgents rode into town shooting from pickup trucks and motorcycles and quickly took control around 4 p.m. Thursday afternoon, Bana Lawan, chairman of the Chibok local government, told The Associated Press.

"Nobody can tell you what is happening there today because everybody is just trying to escape with their lives," he said.

Attempts to call the cellular telephones of parents of some of the kidnapped girls did not succeed. The Boko Haram extremists often destroy cell phone towers and the military often cuts communications to areas under attack.

Dozens of the kidnapped girls escaped in the first couple of days after their capture from a boarding school just outside the town, but 219 remain missing.

Community leader Hussain Monguno said none of the escapees was in Chibok at the time of the attack as they all have been given scholarships to other schools in northern Nigeria.

Nigeria's military chief announced on Oct. 17 that the country's homegrown Boko Haram extremist group had agreed to an immediate cease-fire.

Instead, the insurgents have since taken control of several towns and villages where they have declared an Islamic caliphate along the lines of the IS group in Iraq and Syria.

In an area covering about 20,000 square kilometers (7,700 square miles), residents caught behind the militants' lines say they have set up courts upholding a strict version of Shariah law, publicly amputating the hands of alleged looters and whipping people for infractions such as smoking cigarettes.