Ten children and one adult were killed late Monday in a series of explosions at a gas terminal in the western Afghan city of Herat. The victims lived in a camp for displaced people, which was near the gas terminal.

At least 18 people were injured in the blasts, which were felt across Afghanistan's third largest city, a spokesman for Herat Regional Hospital reportedly said. Four of the wounded were sent to Iran for treatment for 90 percent burns, the Associated Press reported.

"Around midnight (Monday) a gas tanker exploded which triggered blasts in a gas storage plant, killing 11 people and injuring 10 others," Herat police spokesman Abdul Rauf Ahmadi told Agence France-Presse.

The explosions were reportedly so strong that it flung a burning truck into the camp.

It was unclear whether the explosions were a result of an accident or an attack. Gas explosions are not uncommon in Afghanistan, where bottled gas is used for household cooking.