Iraqi authorities say a suicide car bomb attack has killed at least 18 people and wounded 80 others in a strike against a police crime lab in central Baghdad.
Police say the bombing Tuesday caused major damage to the government forensics office in the Karrada neighborhood.
Officials said many of those killed or wounded in the attack were likely police officers.
The blast comes a day after suicide bombers attacked three Baghdad hotels popular with foreigners, killing at least 36 people and wounding 71 others.
Officials said attackers detonated vehicles packed with explosives in quick succession Monday outside Baghdad's Ishtar Sheraton, al-Hamra and Babylon hotels.
The U.S. ambassador to Iraq, Christopher Hill, condemned the latest attacks and called on the Iraqi people to "unite in combatting all forms of violence and attempts at intimidation."
Iraqi authorities had expressed concern that insurgents could stage high-profile attacks to disrupt national parliamentary elections scheduled for March 7.
Coordinated bombing attacks in Baghdad have killed hundreds of people since August.