Transport Canada says it is considering banning all liquids, aerosols and gels from passengers’ carry-on luggage on direct flights from Canada to Russia.

“The safety and security of Canadians remains our top priority,” Ashley Kelahear, a spokesperson for the federal Minister of Transport, told CTV News in an email on Friday.

There are four direct flights from Canada to Russia every week. Kelahear says a ban will be considered for all four flights.

On Thursday, the U.S. Homeland Security Department banned all liquids from luggage taken on board non-stop flights from the U.S. to Russia.

The department had warned airlines that terrorists might attempt to smuggle explosives hidden in toothpaste tubes onto planes bound for the country hosting the Olympics that got underway this week. The warning also said terrorists might try to assemble explosive devices in flight or upon arrival at the Olympics.