A Grass Valley man was arrested in Truckee Thursday after allegedly threatening a motorist with a knife at the Donner Pass Road and the Westbound I-80 Central Truckee off-ramp, according to the Truckee Police Department.

Curtis Mock, 35, was booked at the Truckee Jail and faces charges of exhibiting a deadly weapon and carrying a concealed dagger. He is still in custody at Wayne Brown Correctional Facility.

“An adult male had reported that a subject brandished a knife at him,” said Truckee Police Sergeant Lisa Madden.

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Officers responded to the scene on Thursday and found Mock “acting erratically and walking toward downtown while trying to conceal a large fixed blade knife beneath his jacket,” read a Facebook post.

Mock is believed to be connected with a similar incident that occurred on Dec. 11 with two juveniles, which resulted in no injuries.

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She said she could not confirm that Mock was involved in that incident but said they are currently investigating the case.

Hannah Jones is a reporter for the Sierra Sun. She can be reached at 530-550-2652 or hjones@sierrasun.com.