An unmanned U.S spy plane fired two missiles at a house where some militants were hiding and killed twenty people and injured several.

There were three foreigners among the dead, according to media reports.

A U.S predator targeted a house, located at Shaktoi area near Pak-Afghan border, killed some twenty militants and there are some foreigners are among the dead.

It recent days, U.S has intensified the drone attacks on the tribal areas of Pakistan and it is the 10th attack in about 2 weeks.