Archbishops celebrated a Mass for peace Friday, Zionist students chanted their support for a U.S.-Israeli military alliance, and students zipped into body bags blocked entrances to a military recruiting center in Indiana.

In Amman, Jordan, Muslim demonstrators on Friday called for Iraqi leader Saddam Hussein to destroy Israel. The Jewish state's Arab neighbors waited tensely to see if Israel would respond to an Iraqi missile attack.Detroit Mayor Coleman Young, citing fear of Persian Gulf-related terrorist attacks, declared a state of emergency Friday and requested that Michigan National Guard troops be called in to help protect sensitive facilities.

Young's request is the latest in a series of security-tightening steps taken in the Detroit area, which has one of the largest populations of Arabs outside of the Middle East.

In San Francisco, scene of the nation's most disruptive anti-war rallies, 48 demonstrators were arrested after a mock funeral procession to the Presidio, the scenic headquarters of the 6th U.S. Army overlooking the Golden Gate Bridge.

More than 1,600 anti-war protesters have been arrested in the United States since the outbreak of war Wednesday night, including nearly 200 on Friday.

In New York, protesters screaming "No blood for oil!" blocked entrances to a building that houses the local headquarters of the Defense Department, the FBI and the Immigration and Naturalization Service, and 36 arrests were made.

"The purpose of this protest, and others planned in the coming days . . . is to exert maximum pressure on the U.S. government to immediately end this war, this bloodbath in the Middle East," said organizer John Haines.

Colleges and churches were among the groups organizing peace demonstrations. Rallies also were held to express support for U.S. troops and President Bush's resort to force.

In Los Angeles, police moved in on 100 protesters who refused to end a sit-in in an administration building at the University of California at Los Angeles. They were cited for interfering with a lawful business, said campus spokeswoman Jan Klunder.

Throughout the Middle East and North Africa, Muslim fundamentalists welcomed what they perceived as a long-awaited holy war.

In Mauritania, soldiers and police fired tear gas to disperse about 20,000 demonstrators chanting "Death to America!" and "Muslims have to defend Iraq!" Tens of thousands of fundamentalists marched in Algeria, demanding the government train volunteers to fight alongside Iraq.

In southern Lebanon, about 15,000 marchers chanted, "Saddam, Saddam, wipe out Israel!" as they paraded through Sidon.

"It's jihad time!" some demonstrators yelled as they set fire to an American flag, an Israeli flag and an effigy of President Bush. Jihad is the Muslim term for a holy war.

"Oh Saddam, use gas! Oh Saddam, use chemicals!" they pleaded.