BAGHDAD (AP) — Militants unleashed a wave of car bombings in Iraq on Tuesday, killing at least 34 people and sending thick, black smoke into the Baghdad skies in a show of force meant to intimidate the majority Shiites as they marked what is meant to be a joyous holiday for their sect.

The attacks came nearly two weeks after Iraqis cast ballots in the country’s first parliamentary election since the U.S. military withdrawal in 2011. No preliminary results have yet been released, deepening a sense of uncertainty in a country strained by a resurgence of violence.