At least six people were killed and five others injured in a US drone strike launched late Tuesday night in Pakistan's northwest tribal area of North Waziristan, reported local TV channel Express.

According to the local media reports, the strike took place at about 11:00 p.m. local time when US drones fired four missiles at a house suspected of hiding militants in the Mir Ali area of North Waziristan.

Tuesday's US drone strike is the 40th (counted on daily basis) of its kind in Pakistan since this year. To date, a total of 349 people have reportedly been killed in such strikes in 2011.