Updated

Hundreds of guns that were stolen from a United Parcel Service facility in Tennessee were recovered Tuesday in the Chicago area, federal authorities said.

The Bureau of Alcohol, Tobacco, Firearms and Explosives said most of the roughly 400 guns taken from a UPS facility in Memphis were found in Midlothian, a Chicago suburb.

ATF had said the guns were taken Sunday by two men in a U-Haul truck. ATF spokesman Michael Knight said the truck was recovered along with the guns.

An 18-year-old man has been charged in the theft. Authorities are searching for the second suspect, in addition to anyone else who may have been involved, Knight said.

The estimate of 400 stolen firearms makes it one of the largest single gun thefts the ATF has investigated, Knight said. Agents are trying to determine if some of the guns had already been sold or traded before they were found.

UPS said it is cooperating with law enforcement.

ATF had asked the public to send social media posts, photos or any other information related to the theft. A $5,000 reward was offered for information leading to an arrest and conviction in the case.