Government officials say dozens of militants armed with rocket-propelled grenades and automatic weapons attacked two tribal police posts in northwest Pakistan, killing two policemen. Twenty-one other policemen are missing and presumed kidnapped. The officials say the attacks occurred before dawn Thursday in the town of Darra Adam Khel in Khyber Pakhtunkhwa province. The town is located near Pakistan's tribal region, AP reported. The officials say security forces have launched an operation to try to recover the 21 missing policemen. They spoke on condition of anonymity because they were not authorized to talk to the media.