A dry ice explosion was reported at Los Angeles International Airport last night, but there were no reports of any injuries or evacuations, authorities said.
The incident happened shortly before 8.30pm local time at the airport's Tom Bradley International Terminal. There was no information on where the dry ice was found or whether there was any significant damage.
Two other devices also were found at the airport but they did not explode, Detective Gus Villanueva said.
Investigators do not believe the incident is linked to terrorism and no threat was called into the airport, Mr Villanueva said.
No flights were affected by the explosion, authorities said.
On Sunday night, someone planted a plastic bottle containing dry ice which exploded in an employee toilet in LAX's Terminal 2. Up to four flights were delayed after airport police halted security screening for more than an hour.
No arrests have been made in either case.
A bomb squad was at the airport late yesterday and investigators from the Los Angeles Police Department's criminal conspiracy division were assisting, Mr Villanueva said.