Updated Sunday, January 27, 2019, 9:30 a.m.

UPDATE: Dakota Theriot, the man accused of killing five people in Louisiana, was captured Sunday morning in Richmond County, Virginia, according to a joint statement from the Ascension Parish Sheriff's Office and the Livingston Parish Sheriff's Office.

Theriot, 21, was apprehended following a night on the run after being named a suspect in the shooting deaths of his parents, his girlfriend, and her father and brother in two separate shootings Saturday.

Elizabeth and Keith Theriot, both 50, were at their home near Baton Rouge when the suspect killed them, Ascension Parish Sheriff Bobby Webre said.

When authorities arrived at the scene, Keith Theriot was still alive and told them his son shot them, authorities said.

Dakota Theriot's girlfriend, Summer Ernest, and her relatives were found dead in a home 30 miles away. The dead included her father, Billy Ernest, 43, and her brother Tanner Ernest, 17, according to authorities.

Theriot was dating Summer and had lived with the Ernests for several weeks, Livingston Parish Sheriff Jason Ard said. He was recently asked to leave the residence and not return, according to authorities.

A 7-year old and a 1-year-old were found in the home, but were unharmed and are now with their mother.

Authorities believe the shootings stemmed from a "boyfriend [and] girlfriend type of dispute," CNN affiliate WAFB reported.

"This is probably one of the worst domestic violence incidents I've seen in quite a while," Webre said. "For a young man to walk into a bedroom and kill his mother and his father, and then kill friends in Livingston that he had a connection with."

There were no red flags ahead of the two shootings Saturday morning and other than a simple possession of drug paraphernalia charge, Theriot had no other run-ins with the Livingston Parish Sheriff's Office, Ard said.

Theriot had last been seen driving a gray and silver 2004 Dodge pickup truck belonged to the Ernest family, authorities said.

Theriot will be taken back to Ascension Parish, Louisiana, and booked on two counts of first-degree murder, home invasion and illegal use of weapons, investigators said Sunday.

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Posted Saturday, January 26, 2019 3:12 p.m.

Louisiana authorities are searching for a single gunman after two separate shootings in neighboring parishes left five people dead, including the suspect's parents. CBS affiliate WAFB-TV reports that detectives on Saturday were looking for 21-year-old Dakota Theriot, who is wanted for first-degree-murder, illegal use of weapons, and home invasion.

Deputies with the Livingston Parish Sheriff's Office were dispatched to a trailer park Saturday morning and discovered three people had been killed. In a Facebook post, police identified the victims as Billy Ernest, 43, Tanner Ernest, 17, and Summer Ernest, 20.

WAFB reports that shortly after the bodies were discovered, police announced that a shooting at a home in Ascension Parish had left two people dead. The victims were identified as 50-year-old Elizabeth Theriot and her husband, 50-year-old Keith Theriot – the parents of the accused gunman.

They couple was killed in the bedroom, authorities said.

Police said the suspect was driving a gray 2004 Dodge pickup and was considered "armed and dangerous."

This is a developing story and will be updated.