SOCHI, Russia (AP) — Despite a temporary Russian ban on liquids in carry-on luggage, some air travelers heading to the Sochi Olympics through Moscow brought toothpaste and other toiletries past security checkpoints without any problems.

Security concerns ahead of the Sochi Games were renewed after the U.S. Homeland Security Department warned airlines flying to Russia that terrorists may try to smuggle explosives into the country in toothpaste tubes. The agency on Thursday banned all liquids from carry-on luggage for nonstop flights from the U.S. to Russia.