Air Canada has heightened security precautions after a passenger on a flight bound for Toronto earlier this week discovered a needle in a catered sandwich.

"We can confirm that we received a report from a passenger who found what appears to be a sewing needle in a pre-prepared sandwich on board our flight from Victoria, B.C. (British Columbia) to Toronto on July 30," Air Canada spokesman Peter Fitzpatrick said.

The airline and law enforcement authorities have launched on investigation into the security breach on Monday's flight. The catering service responsible for the in-flight food was immediately contacted about the incident.

This is the second incident involving needles in airplane food in the past month. On July 14, sewing needles were found in food on four Delta flights from Amsterdam to the United States, injuring one passenger.