Dhaka, Nov. 30 -- At least 15 people have been killed in a bomb blast at a religious school in northern Afghanistan's Samangan province, according to a local official.

Provincial spokesman Emdadullah Muhajir added that at least 20 others were also wounded in the explosion in the school in Aybak, the capital of Samangan, on Wednesday, reports aljaeera.com.

"A blast took place around 12:45pm inside Jahdia Madrasa in the centre of the city. Lots of boys are studying at this madrasa [religious school]," he said.

There was no immediate claim of responsibility. Muhajir said an investigation had begun.

The federal interior ministry spokesperson Abdul Nafi Takor confirmed the blast but put the death toll so far at 10, with more injured.