An overturned oil tanker exploded in Nigeria while dozens of people were scooping up the leaking fuel and many were killed, police and witnesses said Saturday.

Hundreds of people have died in similar accidents in recent years in Nigeria, Africa’s largest oil producer, as impoverished people risk their lives to collect fuel leaking from pipelines or trucks.

“We have recovered 12 corpses and taken 22 persons with serious burns to hospital,” police spokeswoman Irene Ugbo told The Associated Press. She said the blast occurred Friday evening in Odukpani in Cross River state in the southeast.

But some residents put the death toll closer to 60.

“The police only recovered a few corpses, many of the other dead were burnt to ashes,” witness Richard Johnson told the AP.

He said about 60 people were inside a pit scooping fuel when the explosion occurred. “It is not likely that anyone inside the pit survived as there was a lot of fuel in the pit,” Johnson said.

He suggested the blast was caused by an electrical generator that had been brought to the scene to help pump out the fuel for people’s containers.

It was not immediately clear what caused the truck to overturn.

About a year ago, more than 30 residents in the same locality were burnt to death while scooping fuel from an oil tanker involved in an accident.

Nigeria’s worst such accident occurred in 1998, when more than 1,000 people died as the leaking oil pipeline from which they were collecting fuel exploded in the town of Jesse.

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In this photo taken with a phone on Friday, Jan. 11, 2019, people gather at the site of an oil tanker explosion in Odukpani, Nigeria. (AP Photo )
In this photo taken with a phone on Friday, Jan. 11, 2019, people gather at the site of an oil tanker explosion in Odukpani, Nigeria. (AP Photo )