At least 47 people including 12 security men and 13 policemen were killed and over 100 others were wounded Sunday in two separate suicide attacks in northwestern Pakistan, according to local press reports.

A suicide bomber killed at least 26 people including six policemen and wounded over 50 others Sunday at a police recruitment center in northwestern Pakistan in the weekend's third major bomb attack, police said.

"It was a suicide attack," senior police official Sharif Virk said after the latest attack, which took place in the town of DeraIsmail Khan in Pakistan's troubled North West Frontier Province (NWFP) near the Afghan border.

"The bomber targeted a police recruiting center where recruits had gathered for an entrance test," he said.

Another police official at the scene said that there were "at least 12 bodies lying in the police recruitment center."

Earlier, in the same province, suicide bombers in two explosives-packed cars hit a Pakistan army convoy, killing at least 21 people, including 12 security forces and civilians while 47 others were injured.

On Saturday a suicide car bomber killed 24 people in a paramilitary convoy in the tribal region of North Waziristan, where local militant leaders said Sunday that they would scrap a 2006 peace accord with the government.