At least six people were killed and several others injured after a dual blast hit Pakistan’s Dera Ismail Khan district in the early hours on Sunday.

“In the first attack, two police were killed and several others injured when some unknown militants sprayed bullets at a police check post and fled the scene”, according to reports

Iftikhar Shah, deputy superintendent of police said, “The second attack happened at a hospital where the policemen were shifting their injured colleagues”.

A female suicide bomber blew herself up near the policemen at the main gate of the hospital, leaving four more policemen killed and scores others injured, he further said.

Salim Riaz Khan, a senior police officer in Dera Ismail Khan, said, “Gunmen on motorcycles opened fire on police in a residential area, killing two”.

“The bomber then struck at the entrance to the hospital, killing another four police and three civilians who were visiting their relatives”, he added.

He said that eight police were among the wounded and that many of the wounded were in critical condition.

The blast damaged the emergency room and forced it to shut down, according to a hospital official,

“The wounded were taken to a military hospital”, officials said

No group or individual has claimed the responsibility of the attack.

Dera Ismail Khan is the main district in the country’s northwest Khyber Pakhtunkhwa province, which used to be a hotbed of militancy, but terrorism has been curtailed greatly after years of the military operation in tribal areas to remove sanctuaries of terrorists.