Pakistan's army has broken its silence over the US commando raid that killed Osama bin Laden, acknowledging its own "shortcomings" in efforts to find the al-Qaida leader but threatening to review cooperation with Washington if there is another similar violation of Pakistani sovereignty.

The tough-sounding statement was a sign of the anger in the army. It also appeared aimed at appeasing politicians, the public and the media in the country over what's viewed by many here as a national humiliation delivered by a deeply unpopular America.