At least 21 people were killed, mostly students, and scores more injured on Friday when a school in central Nigeria collapsed on pupils taking exams, the Red Cross and witnesses said, reports BSS.

Trapped students cried for help under the rubble as desperate parents looked for help after the Saint Academy school in Jos North district of Plateau State fell in on classrooms, according to an AFP correspondent at the scene.

Red Cross spokesman Nuruddeen Hussain Magaji told AFP there were "21 fatalities, and 69 injuries all in admission at various hospitals".

Earlier, AFP saw 16 dead bodies in two hospital morgues in Jos. All were wearing school uniforms.

With his mother at his hospital bedside, injured student Wulliya Ibrahim told AFP: "I entered the class not more than five minutes, when I heard a sound, and the next thing is I found myself here."

"We are many in the class, we are writing our exams," he said.

Earlier, the National Emergency Management Agency said the two-storey building housing Saint Academy collapsed killing "several students."

Chika Obioha, a resident at the scene, told the media that he saw at least eight bodies at the site and that dozens more had been injured.

"Everyone is helping out to see if we can rescue more people," he said.

AFP's correspondent said he saw 11 bodies in the morgue at the Bingham University Teaching Hospital and that five dead were taken into the mortuary at the Our Lady of Apostles Hospital in Jos.

At least 15 rescued and injured students were admitted, officials at the Our Lady of Apostles Hospital said.

Officials at the Bingham University Teaching Hospital did not comment.

It was not immediately clear what caused the collapse but residents said it came after three days of heavy rains.

Bd-pratidin English/Tanvir Raihan