Keep an eye on toothpaste: Airlines warned about possible toothpaste bombs ahead of Olympics

Airplane take off

The United States is advising airlines with direct flights to Russia to be aware of the possibility that explosive materials could be concealed in toothpaste or cosmetic tubes, according to a law enforcement source.

The source emphasized on Wednesday that there was no known threat to the United States, but the notice to U.S. and international carriers is based on new intelligence information ahead of the start of the Olympics in Sochi this week.

“Out of an abundance of caution, (the Department of Homeland Security) regularly shares relevant information with domestic and international partners, including those associated with international events such as the Sochi Olympics,” the agency said in a statement.

The Obama administration has not indicated it is not safe to travel to the Olympics.