LAPLACE, La. — A man accused of making threatening comments about law officers in Nebraska was one of seven people arrested in the shootings of four Louisiana sheriff’s deputies, including two who were killed, state police said Friday

The two other deputies were recovering from serious gunshot wounds after the Thursday morning shootings.

Motives for the shootings and how they unfolded have not been released. The seven were arrested in the attempted murder of the first deputy shot, Michael Scott Boyington. Charges have not yet been filed related to the two deputies who were killed or the second wounded deputy.

The state police superintendent, Colonel Mike Edmonson, said the case is complex, involving two different crime scenes, multiple weapons, and several witnesses. He said evidence and interviews so far placed five of those arrested at the scene where Boyington was shot — a parking lot entrance used by contract workers at an oil refinery.

Brian Lyn Smith, 24, was charged with attempted first-degree murder. Terry Smith, 44; Derrick Smith, 22; Kyle David Joekel, 28; and Teniecha Bright 21, were also charged.