BAGHDAD - Extremists in Iraq targeted Christians in three separate Christmas Day bombings in Baghdad, killing at least 37 people, officials said Wednesday.

In one attack, a car bomb went off near a church in the capital's southern Dora neighborhood, killing at least 26 and wounding 38, a police officer said.

Earlier, two bombs ripped through a nearby outdoor market simultaneously in the Christian section of Athorien, killing 11 people and wounding 21, the officer said.

The Iraq-based leader of the Chaldean Catholic Church, Louis Sako, said that the car bomb exploded after Christmas Mass and that none of the worshipers were hurt. Sako said he did not believe the church was the target.

There was no immediate claim of responsibility for the attacks, but Iraq's dwindling Christian community, estimated to number 400,000 to 600,000, often has been targeted by al-Qaeda and other insurgents who see the Christians as heretics.

The U.S. Embassy in Baghdad condemned the attacks in a statement.

"The Christian community in Iraq has suffered deliberate and senseless targeting by terrorists for many years, as have many other innocent Iraqis," the statement read. "The United States abhors all such attacks and is committed to its partnership with the government of Iraq to combat the scourge of terrorism."

Along with Christians, other targets include civilians in restaurants, cafés, or crowded public areas, as well as Shiites and members of the Iraqi security forces, attacked in an attempt to undermine confidence in the Shiite-led government and stir Iraq's sectarian tensions.

A medical official confirmed the casualty figures.

Wednesday's bombings came amid a large military operation in Iraq's western desert as authorities try to hunt down insurgents who have stepped up attacks across Iraq in the last months, sending violence to levels not seen since 2008.

The Christmas Day attacks brought the number of people killed so far this month in Iraq to 441. According to U.N. estimates, more than 8,000 people have been killed since the start of the year.