TEHRAN: At least four people died and about 80 were trapped under rubble when an unfinished building collapsed in southwestern Iran, reports AFP.

"Parts of the 10-story Metropol building, located in Abadan, capital of Khuzestan province, collapsed," state television said, noting that the premises was still under construction.

At least 80 people were trapped under the rubble and rescue dogs were deployed to help locate them, according to a regional branch of the Red Crescent.

The cause of the collapse was under investigation.