Updated at 5:28 p.m.

Authorities arrested a 14-year-old boy Saturday after he allegedly plotted to murder his parents by giving them sleeping pills and setting their Albany home on fire.

Benton County Sheriff's Office deputies took the boy into custody on two charges of attempted aggravated murder and first degree attempted arson.

The 14-year-old's father called the sheriff's office on Oct. 25, saying he'd received information that his son wanted to give him and his wife sleeping pills, and light the house on fire to kill them.

The boy was not home the night his father reported the information, according to Undersheriff Greg Ridler with Benton County Sheriff's Office. Deputies waited until Saturday to question him.

Two days later, deputies arrested a 13-year-old male accomplice on two counts of attempted aggravated murder. Following an interview Monday, the accomplice said he supplied his friend with the sleep aid medication to kill his parents.

The 14-year-old has provided a motive, but investigators are not releasing the information. The sheriff's office believes it's "not an accurate motive," and are continuing to look into it, Ridler said.

The 14-year-old was taken to the Linn-Benton juvenile detention center Saturday night. His accomplice was taken Monday to the same location. Neither of them have a criminal history.

The sheriff's office is not releasing the names of the juveniles involved.

Ridler said it appears the 14-year-old had been plotting the act for a few weeks. "It was not on a whim. There was some pre-planning," Ridler said.

Additional friends were aware of the boy's plot and are being interviewed.

The sheriff's office is asking juveniles to anonymously report suspicious activity to Safe Oregon at 844-472-3367 or tip@safeoregon.com.

The investigation is ongoing and anyone with additional information is asked to contact Benton County Sheriff’s Office at 541-766-6858.

Contact Virginia at (503)-399-6657, by email at vbarreda@statesmanjournal.com or via Twitter at @vbarreda2.

More:15 essential waterfalls hikes near Salem

More:Salem student raises money for homeless mobile showers

More:Voters will decide whether to keep Oregon's 'sanctuary state,' anti-racial profiling law