One of the explosions was a roadside bomb that targeted a U.S. patrol in eastern Baghdad. A police officer said the blast site was sealed by American forces and there was no immediate way to detail damage or casualties. There was no immediate report of the incident from the U.S. military.
Another police officer confirmed a mortar round hit the heavily protected Green Zone. The Americans did not report damage or casualties from that incident either. Both officers spoke anonymously because they were not authorized to release the information.
On Friday, shaken by two days of deadly bombings in Mosul, the government said it would dispatch several thousand more security forces to that city in a "decisive" bid to drive al-Qaida in Iraq from its last major stronghold.
Prime Minister Nouri al-Maliki gave no details on troop strength or when the additional police and soldiers would arrive in Iraq's main northern city. But it added to growing signs that Mosul could represent a pivotal showdown with insurgents chased north by U.S.-led offensives.
"Today, our troops started moving toward Mosul ... and the fight there will be decisive," al-Maliki said during a speech in the Shiite holy city of Karbala.
The challenge, however, is whether the Iraqi forces have the firepower and training to lead an offensive into Iraq's third-largest city. The U.S. military presence in northern Iraq is relatively thin and it has signaled no immediate plans to shift troops from key zones in and around Baghdad.
Mosul is now considered the main logistical hub for al-Qaida in Iraq because of its size and location
- sitting at a crossroads between Baghdad, Syria, Turkey and Iran. Many extremists fled north as U.S.-led forces began gaining ground in former insurgent strongholds last year, aided by Sunni tribes that rose up against al-Qaida and its backers.
Interior Ministry spokesman Maj. Gen. Abdul-Karim Khalaf told The Associated Press that 3,000 police were being sent to the Mosul region to augment an understaffed force there.
Ninevah province, whose capital is Mosul, has about 18,000 policemen. But only about 3,000 of those operate in the city of nearly 2 million, according to police spokesman Saeed al-Jubouri.