Two people have been arrested on suspicion of using a potato gun to launch illegal drugs into a Canadian jail.

Police say they used the potato gun to launch 28 grams of marijuana, three grams of cannabis shatter, and seven grams of crystal meth over the fencing of the Saskatoon Provincial Correctional Centre in Saskatoon on Sunday.

All the drugs have since been recovered.

Police believe this is the potato gun used to launch drugs over the prison's fence on Sunday evening

Saskatoon Provincial Correctional Centre where two assailants allegedly fired illegal drugs over the fence of the jail using a potato gun

A potato gun is a pipe-based cannon which uses air pressure to launch objects at high speeds.

The two suspects, a 28-year-old woman and 18-year-old man, who have not bene named, attempted to flee the scene in a white Chevrolet van.

Their getaway was thwarted at the 3500 block of Millar Avenue outside the jail when they collided with three police vehicles and came to a standstill.

Saskatoon Provincial Correctional Centre. The two suspects, a 28-year-old woman and 18-year-old man, attempted to flee the scene in a white Chevrolet van

The pair were arrested following an investigation by the Saskatoon Police Service Drug Unit with help from the Ministry of Corrections and Policing.

The 29-year-old has been charged with trafficking crystal meth, distributing cannabis to an institution, conspiracy to traffic, dangerous driving and evading police, among others.

Meanwhile her accomplice was charged with trafficking crystal meth and distributing cannabis to an institution, according to local media.