TAL AFAR, Iraq - U.S. and Iraqi forces have encircled the insurgent stronghold of Tal Afar, and Iraqi authorities today announced the arrest of 200 suspected insurgents there - most of them foreign fighters.

The Iraqi military said 150 of those arrested Wednesday in this town near the Syrian border were Arabs from Syria, Sudan, Yemen and Jordan.

The joint forces have reported heavy battles on the outskirts of the city and several deadly bombings that have mainly killed civilians. Iraqi authorities reported most of the civilian population had fled the city, which is 260 miles north of Baghdad and about 35 miles from the Syrian border.

Eight civilians were killed in the city Wednesday by a suicide car bomber at an Iraqi checkpoint, he said.

Tal Afar is 90 percent Turkmen, and 70 percent of them are Sunnis. After the ouster of Saddam Hussein, the United States installed a largely Shiite leadership in the city, including the mayor and much of the police force.

The Sunni majority has complained of oppression by the government and have turned to the insurgents - who are mainly Sunnis - for protection.

Early today, a militant Web site carried a videotape showing the destruction of a U.S. Bradley Fighting Vehicle in Tal Afar. The video, emblazoned with the logo of al-Qaida in Iraq, claimed the armored vehicle was struck by a roadside bomb.

The military issued no immediate response to the claim.

On Wednesday, the U.S. military, acting on a tip, raided an isolated farmhouse outside Baghdad and rescued an American businessman held hostage for 10 months.

Roy Hallums, 57, was "in good condition and is receiving medical care," a military statement said after U.S. forces freed him and an unidentified Iraqi from the farmhouse 15 miles south of Baghdad.

Hallums, formerly of Newport Beach, Calif., was kidnapped at gunpoint from his office in the Mansour district of Baghdad on Nov. 1, 2004. At the time, he was working for the Saudi Arabian Trading and Construction Co., supplying food to the Iraqi army.

The rescue coincided with two deadly bombings detonated around the southern city of Basra. A roadside bomb killed four private American security agents working for the State Department Bureau of Diplomatic Security. And an Interior Ministry official said 16 people were killed and 21 were injured in a car bombing at a restaurant in a central market.