(CNN) A manhunt is underway in Louisiana following a string of shootings that left the suspect's parents and three others dead, law enforcement officials said.

Authorities are looking for 21-year Dakota Theriot after two Saturday morning shootings in Ascension and Livingston parishes, near Baton Rouge.

"This is probably one of the worst domestic violence incidents I've seen in quite a while," said Ascension Parish Sheriff Bobby Webre.

Theriot is accused of killing his parents, Elizabeth and Keith Theriot, both 50, in the town of Gonzalez, the Ascension Parish Sheriff's Office said.

The Theriots were alive Saturday morning when deputies arrived to their home and were able to identify their son as the gunman, Webre told reporters.

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