Ghana’s president, John Mahama, has called for three days of mourning to begin on Monday after scores of people were killed in an explosion at a petrol station in the capital, Accra.

Around 90 people who sought shelter from flooding overnight at the state-owned GOIL petrol station near a busy downtown intersection were killed, authorities said on Thursday.

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In addition to the dead at the petrol station, local media reported that dozens of people drowned in various parts of the city following two days of torrential rains.

The combined death toll from the explosion and flooding has crossed 150 and again raised concerns over the city’s inadequate infrastructure.

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Al Jazeera’s Ama Boateng, reporting from Accra, said: “This is a very busy area of Accra. Lots of people. Lots of car traffic.

“And because of the heavy rains people gathered at this gas station to seek shelter and this explosion happened.”

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TV footage showed corpses being piled into the back of a pickup vehicle and other charred bodies trapped amid the debris.

Floodwaters around the site hampered rescue and recovery efforts.

Officials at the nearby 37 Military Hospital said its morgue had reached capacity.