Three people were killed and two critically injured in two separate vehicle accidents Saturday and Sunday in two South Louisiana parishes, State Police said.

On Sunday, troopers investigated a three-vehicle crash in Acadia Parish on La. 95 north of Interstate 10 that killed one person and critically injured two others, including a suspected drunk driver, State Police Troop I said in a news release.

State Police said Gerardo Robles, 28, of Church Point, was driving his 2005 Chevrolet pickup truck south on La. 95 at about 7:30 p.m. when for “reasons still under investigation” Robles’ pickup struck the vehicle he was following.

Robles’ pickup then crossed the centerline and hit an oncoming, northbound 1998 Lexus driven by 63-year-old George Fisher, of Eunice, State Police said.

Fisher was pronounced dead at the scene, State Police said. One of Fisher’s passengers, 61-year-old Calvin Cheeks, of Church Point, was taken to a hospital with critical injuries, State Police said. Another passenger, 70-year-old Scottie Fisher, of Eunice, had moderate injuries, State Police said.

The driver and two passengers who were in the 2006 Toyota sport utility vehicle that Robles’ pickup struck from behind sustained moderate injuries, State Police said.

Robles was taken to a local hospital in critical condition, State Police said.

“Troopers suspect Robles was impaired and placed him under arrest for vehicular homicide, six counts of vehicular negligent injury, no seat belt, no driver’s license and reckless operation,” State Police said in a release.

“Once released from the hospital, Robles will be booked into the Acadia Parish Jail,” State Police said.

The Acadia Parish accident followed another fatal crash investigated by Troop I that claimed two lives in Iberia Parish, police said.

At 5:32 p.m. Saturday, Joel Morvant, of New Iberia, was killed when he tried to pass another southbound vehicle on La. 85 in Iberia Parish and crashed into a northbound 2006 Chevrolet Tahoe driven by Gregory Landry, of Lafayette, who also was killed, State Police said in a news release.

Morvant, 24, who was wearing a seat belt, and Landry, 54, were pronounced dead at the scene, police said.

Investigators were trying to determine whether Landry was restrained in the Tahoe that erupted in flames after the crash, State Police said.

A passenger in Morvant’s 1994 Mazda 929, 27-year-old Cody Snyder, of New Iberia, was taken to a hospital with moderate injuries, State Police said.

State Police said that so far it’s undetermined whether driver impairment was a factor. State Police said they obtained toxicology samples that will be sent to the State Police Crime Lab.