BAGHDAD - Shiite militants are hammering the U.S.-protected Green Zone with rockets and mortars for the fourth day this week.
Thick, black smoke is billowing from inside the heavily fortified home to the U.S. Embassy and Iraqi government.
Embassy spokeswoman Mirembe Nantongo says no one has been injured in Thursday's attacks.
American military officials say the attacks are coming from breakaway factions of anti-American cleric Muqtada al-Sadr's Mahdi Army.
The groups are believed to be funded and trained by Iran. However, Iran has denied the allegations.