The number of people killed in a fuel tanker explosion in Morogoro, Tanzania, has risen to 89 on Thursday, an official said.

Aminiel Aligaesha, public relations officer with the Muhimbili National Hospital, the country’s leading medical referral facility, said seven more victims died on Thursday.

He added that doctors and nurses are working round the clock to save the lives of 31 victims admitted to the hospital.

The seven were among the 38 admitted to the hospital with severe burns after the explosion on saturday that killed over 60 on the spot in Morogoro, 200 km west of commercial capital, Dares Salaam.

On Sunday, 71 of the deceased were buried in a mass grave.

Most of the dead were reportedly trying to collect petrol leaked from the overturned fuel tanker before it exploded.

Also on Sunday, Prime Minister Kassim Majaliwa announced the formation of a special team to investigate into the explosion.

Majaliwa told the people who gathered at the Morogoro regional hospital to identify bodies of victims that he has ordered the investigative team to submit the report to him on Friday.