Everett Police detectives have arrested one UPS employee for stealing several iPhones and other customer goods.

Officers were called to a UPS shipping facility on Monday after receiving a report from corporate security that employees were seen putting stolen iPhones and other packages into their personal vehicles.

Security officials estimated that that more than 30 cell phones had been stolen since the end of October. They valued the thefts between $20,000 and $30,000 and included the new iPhone X, older iPhone versions, and Samsung Galaxy.

Officers contacted the two employees and recovered several phones and boxes. Both employees were arrested, interviewed by a Property Unit detective, and released pending further investigation.

Soon after, detectives learned the iPhones were being sold on Offerup.com. The detectives proceeded to arrange to buy one of the offered phones. One of the men previously arrested showed up to make the sale.

The 24-year-old Everett man was arrested with stolen phones and illegal drugs in his possession. During an interview, he admitted to stealing 14-15 phones from UPS and selling them on Offerup.com

The man has been arrested and booked into the Snohomish County Jail on theft, trafficking stolen property and drug charges.

The Associated Press contributed to this story.