At least five people were killed and six injured when a suicide bomber blew himself up inside a stadium in northwest Pakistan on Sunday, officials said.

At least five people were killed and six injured when a suicide bomber blew himself up inside a stadium in northwest Pakistan on Sunday, officials said.

The bomber was believed to have been targeting a group of refugees from the country's troubled tribal belt who had gone to a government-run camp in the Arbab Niaz stadium to fill out paperwork ahead of their journey home.

Senior police official Faisal Mukhtar said the bomber blew himself up near a small mosque inside the stadium and the dead included one tribal policeman.
Najeeb U Rehman, another senior police official, confirmed the incident.

"It was a suicide blast, around 10 kilograms of explosives were used," he told AFP.

He said the suicide bomber was trying to target the refugees who had fled fighting between the military and the Taliban in the Khyber tribal district.

"But he could not reach them because the security forces started firing at him and he blew himself up," Rehman said.

Shahid Afridi, a firefighter present at the site during the blast, said a man in his twenties entered the stadium and started firing with a pistol.

"The security forces retaliated and then there was a explosion and I fell to the ground," said Afridi, who sustained leg injuries following the blast.

Muzafaruddin Sadiq, head of the government-run Lady Reading Hospital, said: "We have five dead bodies and six injured," adding one person remained in critical condition.