At least sixteen people have been confirmed dead and scores more injured after a fire broke out in a high-rise office building in Dhaka, officials have said.

Many people were trapped inside the building when the fire broke out in the Bangladeshi capital on Thursday and rescue workers warned that the death toll could rise as firefighters search the charred structure.

The fire had lost some of its intensity but was not fully extinguished

The blaze at the FR tower, located on a busy avenue in Dhaka’s Banani commercial district, was the latest in a city where flouted building regulations and safety norms have made deadly blazes common.

Witnesses described seeing people shouting for help from windows on the upper floors of the building. Some workers slid down a television cable on the side of the building, while others grabbed ropes that were lowered by emergency service helicopters which pulled them out of the blaze.

At least six people died after jumping from the 22-floor building.

Helicopters dropped water on the blaze as flames and thick black smoke poured out of the windows. 

Scores of firefighters were backed by navy and air force specialists, authorities said.