A series of explosions at a gas terminal in the western Afghan city of Herat killed 10 children and an adult, a hospital official said.
Those killed lived in a camp for displaced people, which was next to a gas company compound, BBC reported.
A spokesman for Herat Regional Hospital said another 18 people were wounded the in the blasts that were felt across Afghanistan's third largest city.
Bottled gas is used for household cooking across the country. Social media images showed flames shooting high into the night sky.
It was not clear whether the explosions were an accident or the result of an attack.
Four of the wounded were sent to Iran for treatment for 90% burns, Herat hospital spokesman Rafiq Sherzai said. A powerful explosion had flung a burning truck into the displacement camp, he added.
According to the UN, more than 700,000 people have been internally displaced in Afghanistan because of conflict.
Herat, a key business hub located in western Afghanistan near the border with Iran, is a relatively peaceful province in a country convulsed by an ascendant 14-year Taliban insurgency.
But in May last year four insurgent gunmen launched a predawn attack on India’s Consulate in Herat before being repelled by security forces, in an assault highlighting the precarious security situation in the country.
At least four Afghans were also killed in September 2013 in a Taliban suicide attack on the US Consulate in the city.
