A 31-year-old man is facing numerous charges after threatening a Sarnia police officer, fleeing and locking himself inside a local business.

Around 1 p.m. Wednesday, a COPPS Unit officer stopped a man on a bicycle on Wellington Street near Mitton Street.

Police say he gave a false name and was reaching into his backpack when the officer saw a syringe and possible methamphetamine and told the man he was under arrest.

Officials say the man dropped the bicycle and fled on foot, pulling a knife while running and threatening the officer.

He then reportedly ran into a business in the 100 block of Mitton Street South, locking the door behind him, and continued to brandish the knife threatening to harm himself.

Police say an officer was able to speak to the man convince him to let a male employee leave the business and a short time later police entered and Tasered the man, taking him into custody.

In addition to the suspected methamphetamine the man also allegedly had three tablets of morphine in his possession.

He was transported to hospital as a precaution before being transferred to police custody to await a bail hearing.

He has been charged with; public mischief, two counts of possession of a controlled substance, resisting a police officer, uttering threats, possession of a weapon for a dangerous purpose, mischief, forcible confinement, unauthorized possession of a weapon, three counts of breaching a weapons prohibition and breaching his probation.