Police say they believe a disgruntled employee is behind two dry ice explosions at Los Angeles International Airport, but they have not yet identified a suspect.
Deputy Chief Michael Downing says authorities do not believe the explosions are linked to terrorism, but could be linked to a labor dispute. Downing says the bombs, which were made by putting dry ice in 20-ounce bottles, could have caused serious injury to anyone in close proximity, though no one was hurt.
Police are treating them as seriously as if they were pipe bombs.
One device exploded in an employee men's room Sunday. An exploded bottle was found that night on the tarmac near the international terminal, but an employee threw it away. The same employee found an unexploded bottle Monday evening and then reported his earlier find.
Air traffic was back to normal Monday after the Sunday evening explosion caused a commotion in LAX's terminal 2. Up to four flights were delayed after airport police halted security screening for more than an hour.
The bathroom was in an area of the terminal that isn't accessible to the public, according to FBI spokeswoman Laura Eimiller. She said there was "no stated threat associated with the incident."
The Associated Press contributed to this report.