MALABO - The death toll from a series of explosions in a military barracks in Equatorial Guinea has risen to 98, the health ministry said Monday after volunteers searched the rubble for bodies.

At least 615 people were injured in the Sunday blasts, which started with a fire at the Nkoantoma Military Base in the coastal city of Bata, according to the defense ministry.

Citing Vice President Teodoro Nguema Obiang Mangue, the health ministry put the death toll at 98, more than triple an earlier estimate of 31 killed.

Of the wounded, 299 remained hospitalized, the ministry wrote on Twitter.

President Teodoro Obiang Nguema, the vice president's father, has attributed the accident to negligence related to the handling of dynamite and said the explosions damaged almost all homes and buildings in Bata, a city of just more than 250,000 people.

Equatorial Guinea's health ministry posted on Twitter that it had prepared a mental health brigade made up of psychiatrists, psychologists and nurses to attend to the victims of the blast.

"The damages are not only physical but also mental," the ministry said.

Images published by local media showed bodies wrapped in sheets and lined up on the side of a road, with children being pulled from piles of broken concrete and twisted metal.

Television station TVGE showed the vice president visiting a hospital where victims were being treated Monday.

The blasts come as Equatorial Guinea, an oil producer, is suffering a double economic shock because of the coronavirus pandemic and a drop in the price of crude oil, which provides around three-fourths of state revenue.

The former Spanish colony has been run by Obiang, Africa's longest-serving leader, since 1979.

The majority of the population of 1.4 million lives in poverty. The government has called for international support to help in the search and rescue effort and also in efforts to rebuild.

"Following the devastating explosions in Bata yesterday... Spain will proceed with the immediate dispatch of a shipment of humanitarian aid," Spanish Foreign Minister Arancha Gonzalez Laya wrote on Twitter.