The death toll from a series of explosions in military barracks in Equatorial Guinea has risen to 105, the health ministry said on Tuesday.

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

President Teodoro Obiang Nguema Mbasogo signed a presidential decree announcing that flags across the country would fly at half-staff from March 10 to 12 to mourn the victims.

Bata, Equatorial Guinea's largest city, has been listed as a disaster area, according to the presidential decree. The government has allocated 10 billion Central African CFA francs for disaster relief and set up a special bank account to receive donations.

The Chinese embassy in Equatorial Guinea confirmed that seven Chinese nationals who sustained minor injuries had received medical treatment. 

Following the explosions on Sunday, health authorities called on people to donate blood and encouraged volunteer health workers to help. The Chinese medical mission in Equatorial Guinea, a branch of which is based in Bata, helped the rescue work and donated medical equipment, the Chinese embassy tweeted on Monday evening. 

Prime Minister of Equatorial Guinea Francisco Pascual Obama Asue on Monday praised the Chinese medical mission's contribution to saving victims in the blasts in the country's largest city of Bata. 

The explosions happened at around 2:15 p.m. when explosives warehouses at the Nkoa Ntoma military camp caught fire following a blaze at nearby farms, leading to successive blasts.

"The city of Bata has been the victim of an accident caused by the negligence of the unit in charge of storing explosives, dynamite and ammunition at the Nkoa Ntoma military camp," Equatorial Guinean President Teodoro Obiang Nguema Mbasogo said in a statement. "These caught fire due to stubble-burning by farmers in their fields which ultimately made these depots explode in succession."

As of Monday, the explosion sites are out of danger, and the explosives neutralized, and a further investigation into the accident was ordered.

Footage broadcast by the TVGE channel showed buildings burned and flattened in a wide radius around the military camp with a thick plume of black smoke rising into the sky.

Residents have shown up at hospitals treating the injured to donate blood and several non-governmental organizations are distributing clothing, water and daily necessities to those in need.