News Headlines - Taliban threaten 2 attacks per week in Pakistan

A suicide bombing at a crowded Shiite mosque south of Pakistan's capital killed 22 people Sunday, the latest evidence of how security in the U.S.-allied nation is crumbling well beyond the Afghan border region where al-Qaida and Taliban fighters thrive.

The violence came as a senior Pakistani Taliban commander said his group was behind a deadly suicide bombing Saturday night in Islamabad and promised two more attacks per week in the country if the U.S. does not stop missile strikes on Pakistani territory.