A suspected U.S. drone missile strike on Wednesday killed at least six
militants in a semi-autonomous tribal region bordering Afghanistan --
the third such assault in 24 hours.
Some foreign militants are suspected to be among the dead in the attack in North Waziristan's main town of Miran Shah, a stronghold of Taliban and al-Qaida militants.
In Washington, the U.S. House of Representatives approved a bill to triple non-military aid to Pakistan to $1.5 billion a year for the next five years, in an effort to counter extremism.
The aid package is designed to launch various development projects, including efforts to improve education, democratic institutions, human rights and conditions for women and children.
The bill says Pakistan must prevent groups from carrying out cross-border attacks into neighboring countries, must close terrorist camps in tribal areas, and must dismantle terrorist bases in other areas.
Last week, the Senate approved the same bill. It now needs the signature of President Barack Obama to become law.
The expanded aid comes on top of at least $12 billion in economic and security assistance that Washington has given Islamabad since the al-Qaida terrorist attacks against the United States on September 11, 2001.