Afghan building site truck bomb kills 20 in Paktika
At least 20 people were killed when a truck full of explosives was detonated at a construction company compound in eastern Afghanistan, officials say.
Fifty others were injured in the attack which took place on Sunday night in the Barmal district of Paktika province.
The dead and wounded included labourers, engineers and security guards, the AFP news agency reported.
Paktika's provincial spokesman said the Taliban claimed responsibility for the blast.
The province shares a border with Pakistan's restive tribal areas and has seen more violence in recent months.
The circumstances of the blast were being investigated, provincial spokesman, Mokhlis Afghan told the Associated Press news agency.
A record number of civilians were killed in Afghanistan last year.
A recent UN report on civilian deaths said the Taliban were responsible for 75% of all deaths.
It said the proportion killed by Afghan and Nato forces fell, accounting for 16% of civilian deaths.
The UN says the remaining casualties could not be attributed to any one side in the conflict.