Police arrested a man accused of beating his parents in their sleep with a hammer Monday, then possibly setting fire to the couple’s home while they were at the hospital being treated for their injuries.

Jordan Ray Smith, 28, first attacked his 64-year-old mother, hitting her with a blunt object before 3 a.m., police spokesman Cpl. L’Jean McKneely said.

The son then allegedly attacked his 66-year-old father.

The parents were taken to a local hospital where they were treated for nonlife-threatening injuries, McKneely said.

McKneely said the parents had gotten into an argument with Smith earlier in the day about his drug use. The attack stemmed from that argument.

While police were at the hospital investigating the beating, McKneely said, other officers were called to the victims’ Parkview Oaks home where a fire was reported.

Fire Department spokesman Robert Combs said firefighters were called to 12430 Parkciel Ave. between Coursey Boulevard and Jefferson Highway at 4:45 a.m.

Firefighters extinguished the blaze, which gutted the back of the house and severely damaged the front, by 5:10 a.m. Investigators are still looking into its cause, Combs said.

Police suspect the son started the blaze, but the investigation is ongoing. The son has threatened to set the house on fire before, McKneely said.

Smith, 4624 Park Oak Drive, was arrested at 5:55 p.m. and booked into Parish Prison on two counts of cruelty to the infirm, aggravated second-degree battery and one count of manufacturing and cultivation of marijuana.