Students killed as bomb blast hits Afghan school . At least 17 people have been killed and 26 injured after a bomb blast hit a religious school in the city of Aybak in Samangan province Afghanistan. #Blast_In_Scheel

"The blast took place in the city of Aybak in Samangan province, reportedly as people were leaving prayers.

The majority of those killed are believed to be children aged nine to 15, a source in Samangan told the BBC. 

No group has claimed responsibility for the attack, and the death toll could increase. 

A doctor at the local hospital said most of the victims were students at the school. 

"All of them are children and ordinary people," one doctor was quoted by AFP as saying. 

He added that some patients with critical injuries were transported to larger hospitals in Mazar-i-Sharif - about 120 kilometres (74 miles) away - for better treatment. 

Interior ministry spokesman Abdul Nafee Takkur said the Taliban's security forces were investigating the attack, and vowed to "identify the perpetrators and punish them for their actions". 

The former president of the Islamic Republic of Afghanistan, Hamid Karzai, said the explosion was a "crime against humanity" in a tweet, and expressed his sympathy to the families of the victims." 

Read more.