A 23-year-old Sarnia man found armed with knives while yelling at a tree in Centennial Park Thursday admitted to police he'd been taking crystal meth.

Sarnia Police received a call about a strange man in the north area of the Sarnia park around 9:30 a.m.

Officers arrived to find him yelling up to a tree about his family being threatened.

The man then removed a large stainless steel knife from his waist before police ordered him to drop the weapon and drop to the ground.

The man complied, was handcuffed and searched. Officers found two more knives – a small utility knife and a kitchen knife.

He was arrested for possession of dangerous weapons, and was held for bail.

The man admitted to police that he had taken crystal methamphetamine the previous night.