EDMONTON -- Concerns about growing violence around the world, including mass shootings in the U.S., has prompted at least one Alberta school board to cancel all international field trips.

The Edmonton Catholic School District has sent a memo to all staff saying the decision affects 20 trips for the rest of the school year and is based on concern for student safety.

An administrator notes recent events in Europe and mass shootings in the United States show that acts of violence can occur anywhere at any time.

An organization that provides insurance for school districts is strongly recommending that all school boards in the province re-evaluate international travel.

The Alberta School Boards' Insurance Exchange says terrorist attacks are growing and the Islamic State's aggressive disregard for human life makes the group dangerous and volatile.

The Calgary Catholic School District has also cancelled all international travel because of safety concerns, but doesn't specifically mention terrorism or violence.