LAPLACE, La. (AP) — Louisiana authorities have called a news conference where they are expected to identify suspects and charges in the deadly shootings of two sheriff’s deputies west of New Orleans.

St. John Parish deputies Brandon Nielsen and Jeremy Triche were killed Thursday. Two other deputies were wounded. And two of the five people who were taken into custody also were injured.

The gunfire began around 5 a.m. with the shooting of a deputy who was working a security detail at a parking lot used by contract workers at a nearby refinery. The motive in that shooting remains a mystery.

More gunfire followed when deputies were interviewing suspects at a nearby trailer park.

State police said the news conference was set for late Friday morning in Laplace.