Two suicide bombings at a refugee camp killed at least 23 people and injured 40 others Saturday in north-west Pakistan, police said, DPA reported.
The attacks occurred in the Kacha Pakka area of Kohat district in North-West Frontier Province, apparently aimed at the Shiite Muslims among thousands of people that have fled the fighting in the tribal district of Orazkzai.
Fazal Naeem, a provincial police spokesman, said by telephone that one bomber detonated his explosives among people queued up for daily rations provided by the government.
Seven minutes later, as rescue work had just begun, a second suicide bomber struck, he said.
"Twenty-two bodies are lying in front of me and one of the around 40 injured moved to hospital succumbed to his injuries," Naeed said. "We have recovered the severed heads of the both attackers."
The official said most of the victims Shiite Muslims displaced by the fighting between Taliban militants and the army in Orakzai district.
"It is clearly a sectarian attack," the police official said.
Pakistan has a long history of sectarian clashes between extremist groups from majority Sunni and minority Shiite Muslim groups.
The rivalry has intensified since the spread of Taliban influence in the border areas near Afghanistan. Taliban and al-Qaeda both belong to Sunni sect.
Orakzai agency has been a main centre of sectarian violence, where militants led by Taliban leader Hakimullah Mehsud have regularly targeted Shiite Muslims.
The United Nations said this week that 210,000 people abandoned their homes since the military offensive began in late 2009.
They include some 50,000 refugees who fled when the military launched a ground offensive last month.
Earlier, a security official said that 21 Taliban rebels were killed on Saturday in fighting in Orakzai.
On Friday, a suicide bomber exploded himself at a hospital in Quetta, the capital of south-western Balochistan province. Eleven people, including a senior police officer, died in that attack against Shiite Muslims.
A member of the national parliament from the ruling Pakistan People's Party was one of 28 people injured.
Double suicide attack at Pakistan refugee camp kills 23 (UPDATE)
The attacks occurred in the Kacha Pakka area of Kohat district in North-West Frontier Province, apparently aimed at the Shiite Muslims among thousands of people that have fled the fighting in the tribal district of Orazkzai.