(CNN) — Baghdad (CNN) -- Iraqi authorities executed four al-Qaeda senior leaders after they were convicted of terrorism, the nation's Ministry of Justice reported Monday.
Manaf Abdul-Raheem Abdul-Hameed al-Rawi, the leader of the so-called Islamic State of Iraq in Baghdad, was among the four who were executed by hanging Monday morning.
The executions came on a day when a suicide bomber drove an oil tanker into a police station in central Tikrit, killing at least nine people and wounding 20, an official with Iraq's interior ministry said.
Tikrit is about 160 kilometers (100 miles) north of Baghdad. It's a predominantly Sunni town located in Salaheddin province and is the hometown of former Iraqi leader Saddam Hussein.
In Baghdad, two policemen and a civilian were shot dead by gunmen in a pair of incidents, the Interior Ministry said.
Bombings mark 10 years of war Two other people were wounded, according to the ministry official.
The security situation in Iraq was supposed to be the subject of a parliamentary session Monday attended by Iraqi Prime Minister Nuri al-Maliki, who is also the military's commander-in-chief, along with the acting minister of defense, the acting minister of interior, the commander of Baghdad operation command and the head of Iraqi intelligence services.
But al-Maliki did not attend, instead sending a letter to the speaker of the parliament, Ossama al-Nujaifi, saying that to discuss such sensitive issues in an open session could harm national security.