Heart: At least 18 police and civilians were killed in a suicide attack in Afghanistan's western province of Farah on Thursday, officials said.

The blast took place in a bazaar near a police station in Del Aram district of Farah, they said.

Officials near the site said the bomber may have been wearing a burqa similar to what Afghan women commonly wear, Farah’s governor said.

"I know that 18 people have been killed, but do not know whether the bomber was a man or woman or was wearing burqa or not," said a police officer from Del Aram.

Two police vehicles were destroyed in the attack, he said.