Celtics guard Terrence Williams was arrested Sunday after allegedly making threats to the mother of his child while brandishing a gun, police said.

The Kent (Washington) Reporter reports that police are investigating a domestic violence case involving Williams. At about 1:55 p.m., police were called to the home of the victim, who has a 10-year-old son with Williams, who was there for a scheduled visitation. An argument ensued in the parking lot, and Williams allegedly took out a gun. Williams left before the police arrived but was later found and taken into custody.

"We investigate and treat all cases such as this very seriously regardless of the status of those involved," Kent police detective Melanie Frazier told the newspaper.