President Gen. Pervez Musharraf suspended Pakistan's constitution and deployed troops in the capital Saturday, declaring that rising Islamic extremism had forced him to take emergency measures. He also replaced the nation's chief justice and blacked out the independent media that refused to support him.

Authorities began rounding up opposition politicians, cut phone lines in Islamabad and took all but state television off air despite calls from Washington and other Western allies not to take authoritarian measures.

The U.S. called for Musharraf to restore democracy. However, the Pentagon said the emergency declaration does not affect U.S. military support for Pakistan and its efforts in the war on terrorism. Britain said it was deeply concerned.