A Long Island woman arrived at JFK Airport with hundreds of bullets in her carry-on bag, the Transportation Security Administration said Thursday. 

TSA officers scanning bags inside the airport on Tuesday discovered nine boxes of bullets inside a Hicksville woman’s carry-on luggage, the agency said in a press release. 

The boxes contained close to 400 bullets for firearms including 12-gauge, .308-caliber, .223-caliber, and 9mm shotguns and handguns, according to the release. 

The woman told the officers she accidentally grabbed her son’s bag to use as a carry-on without realizing the bullets were inside, the release said. 

Port Authority police officers confiscated the bullets, and the woman received a citation, the release added. She could receive a federal civil penalty, the TSA said.

“This is an excellent opportunity to remind travelers that it is always best to start with a completely empty bag when packing for a flight to ensure that you don’t have any prohibited items inside,” John Bambury, TSA’s federal security director for JFK Airport, said in a statement. 

“Not only is it important to know that you have not packed anything prohibited or illegal into your luggage, it is just as important to know which bag is yours to ensure you are familiar with its contents,” Bambury added.