Fifth Harmony's Lauren Jauregui was arrested last night for carrying weed while trying to board a flight in Washington.

The singer was trying to board a plane in Dulles Airport when she was stopped at a TSA check point.

According to TMZ, when Lauren was stopped, she was forced into a secondary search, when a TSA agent found a bag of marijuana in her carry-on luggage.

The police were then called into the terminal and arrested Lauren.

The Fifth Harmony member was flying to Brazil to perform with her band.