In a statement, the prime minister said the current situation in Iraq calls for changes in the cabinet.
He did not give details. But news agencies say one of the moves might include the Interior Ministry, which controls the police and is under Shi'ite control.
The Maliki government has been unable to stem the increasing insurgent and sectarian violence. Maliki, a Shi'ite whose support comes from Shi'ite parties in parliament, has refused to disarm Shi'ite militias allegedly responsible for the kidnapping and torture of Sunnis.
In violence Sunday, a suicide bomb killed at least 35 people, most of them police recruits, at a recruitment center in Baghdad.
In southern Iraq, four British troops were killed when their patrol boat was attacked on the Shatt al Arab waterway in the southern city of Basra.
Coalition officials report that three U.S. soldiers were killed in combat in Al Anbar province Saturday. No further details were released.
The government of Prime Minister Maliki was formed in May, five months after elections made Shi'ites the largest bloc in in parliament. The national unity government has distributed cabinet positions among Shi'ites, Kurds and Sunnis.
Information for this report is provided by AP and Reuters