DETROIT - The Canada Border Services Agency made a plea to Americans on Monday after border services officers discovered undeclared weapons five times -- four incidents involving Michigan residents -- since Jan. 10.

"Don't bring your guns into Canada," agency spokeswoman Jean D'AmelioSwyer said emphatically. "Leave your firearms at home. But if by chance they do have a firearm in the car, it is imperative that they declare it."

Those found with weapons can face fines, jail time or both. The first time border agents find an undeclared weapon, the vehicle involved is held until payment of a fine of $1,000 per weapon.

In the most recent incident, a Michigan resident was charged with not reporting a firearm and making false statements Wednesday after agents found an undeclared firearm during a second interview at the Ambassador Bridge crossing to Windsor, Ontario. The day before, a Michigan man was charged with smuggling and making false statements when border agents found an undeclared, loaded semi-automatic pistol with 15 rounds of ammunition under the driver's seat at the bridge crossing.

"The CBSA takes its border protection responsibilities very seriously, and our officers work diligently and vigilantly to prevent the smuggling of firearms across our borders to help make our communities safe," said Rick Comerford, regional director general of the agency's southern Ontario region.