The Canadian government has issued a safety and security warning for travellers visiting Playa del Carmen in Mexico.

The advisory notes that the United States issued an alert on Wednesday warning American citizens that information had been received about a security threat in the coastal resort town.

U.S. government employees are currently not allowed to travel to the area until further notice.

The warning comes in the wake of an explosion last month on a tourist ferry in Playa del Carmen, which injured more than 20 people.

Another explosive device was found on a ferry last week, but did not detonate.

The Canadian notice, which comes as many are preparing for spring break vacations, warns travellers "to exercise a high degree of caution in Playa del Carmen" and avoid taking tourist ferries.