BAGHDAD (CNN) — A militant group with al Qaeda links claimed responsibility for a deadly wave of bombings across Iraq, strikes designed to undermine government security plans for the upcoming Arab League summit.

The Islamic State of Iraq, an umbrella group that includes al Qaeda in Iraq, made the claim in a statement posted on an al Qaeda website. The explosions killed 45 people and wounded hundreds Tuesday.

Occurring on the ninth anniversary of the U.S. invasion of Iraq, the attacks were “coordinated” and launched by Sunni lions in Baghdad and other provinces “simultaneously,” the online statement said.

They were meant to target the security plan “of the government of fools inside the Green Zone, in preparation of the meeting of Arab tyrants in Baghdad,” the statement said. The country is hosting the next Arab League summit on March 29.

Al Qaeda in Iraq is a Sunni militant group in a majority Shiite country. The Sunni minority had a great deal of power during the reign of longtime dictator Saddam Hussein but lost its clout after he was toppled.

Many Sunnis have felt disenfranchised in Iraq in the post-Saddam era and some have embraced the insurgency. Sectarian conflict raged between Iraq’s Shiites and Sunnis during the Iraq war.

While the insurgency’s support and potency has eroded in Iraq, authorities believe the bombings were meant to send a message that the militant group is still able to carry out such attacks.

Police in Baghdad reported more violence on Wednesday

A mother and her three children were slain in Zafaraniya, a Sunni-Shiite neighborhood in the city’s southeast. Gunmen shot dead a Ministry of Trade employee in the northwest.

Nine people were wounded, six in a car bombing in central Baghdad and nine by a roadside bomb in the southeast.