Iraqi security forces said they killed 19 militants while attacks elsewhere in the country left three people dead on Monday, as violence spikes ahead of parliamentary elections.

The April 30 polls, Iraq’s first since 2010, come as the authorities battle the worst sustained period of bloodletting since 2008, when Iraq was just emerging from a brutal Sunni-Shiite sectarian war that left tens of thousands dead.

The unrest, which has already killed more than 2,400 people this year, has been principally driven by anger in the Sunni Arab minority over alleged mistreatment at the hands of the Shiite-led government and security forces, as well as spillover from the civil war in neighboring Syria.