A Hamilton man has been charged with assault, weapons and drug offences after brandishing a knife at officers inside police headquarters Monday, police say.

The incident started around 9:30 p.m. when a man walked into the lobby of police headquarters downtown. Police say the “agitated” man told officers he had been involved in an assault earlier that evening.

Officers investigated and confirmed the man had been involved in an assault on a family member. When they tried to arrest him, he told officers they would “not be arresting him today” and walked out of the station, police say.

When the officers started to take the man into custody he pulled out a knife. The man was arrested at gunpoint and dropped the knife when ordered.

A 25-year-old Hamilton man was arrested and held for a bail hearing. He was charged with assaulting a peace officer, possession of a weapon for a dangerous purpose, possession of under 30 grams of marijuana, failing to comply with three counts of a probation order and failing to comply with a recognizance.