At least six people were killed in a US drone strike in the Pakistan's northwest tribal area of North Waziristan this morning. Geo TV said US drones fired four missiles at a vehicle suspected of carrying militants in the Mir Ali area of North Waziristan, which is believed to be a stronghold of militants. The strike came just a day after the Pak Prime Minister Yusuf Raza Gilani criticized the US drone strikes as counterproductive and increasing problems for his government.