BAGHDAD (AP) — Bombings across Iraq killed 44 people today, striking at police and Shiite pilgrims in a torrent of violence that officials had dreaded in the run-up to a Baghdad meeting of the Arab world’s top leaders, which the government hoped would showcase the nation’s stability.

There was no immediate claim of responsibility for the attacks, which also wounded nearly 200 people. But authorities have feared al-Qaida or its Sunni sympathizers would try to thwart next week’s annual Arab League summit.

The gathering is to be held in Iraq for the first time in a generation. Plans for Baghdad to host the meeting last year were postponed, in part because of concerns about Iraq’s security.

One of the deadliest strikes today hit the Shiite holy city of Karbala, where officials said two car bombs exploded in a crowded shopping and restaurant area. Thirteen people were killed and another 50 were wounded in that attack, said local provincial council member Hussein Shadhan al-Aboudi.