Frightened workers have wired thousands of dollars - and in one case took off their clothes - to placate a caller who said he was watching them but may have been thousands of miles away. The FBI and police said Wednesday they are investigating similar bomb threats at more than a dozen stores in at least 11 states, all in the past week.
"At this point, there's enough similarities that we think it's potentially one person or one group," FBI spokesman Rich Kolko said from Washington.
No one has been arrested, no bombs have been found and no one has been hurt, though the calls have triggered store evacuations and prompted lengthy sweeps by police and bomb squads.
Investigators say it's possible the scammer is using the Internet to access security cameras inside the stores and they suspect the telephone threats may be coming from overseas, reports CBS News correspondent Bob Orr.
Law enforcement officials say the caller claims to have a bomb and orders the store to send money to an account through an in-store money transfer service such as Western Union. He often claims to be able to see inside the store, but officials believe he was making it up.
In Newport, R.I., employees at a Wal-Mart got three calls Tuesday morning and wired three payments totaling $10,000 to an account outside the country, Sgt. James Quinn said. A spokeswoman for Wal-Mart Stores Inc. said the company was assisting in the investigation, but offered no further comment.
The first of the threats that federal investigators are aware of came last Thursday at a Safeway in Sandy, Ore. The caller initially said he had a gun and was watching the store, but after meeting resistance to his demands he claimed to have a bomb, Sandy police Chief Harold Skelton said.
In Buchanan, Mich., on Monday, the caller directed employees of a Harding's market to lock the front doors, move to the front and told them not to call police, said Berrien County Sheriff Paul Bailey. The man claimed he could see some workers standing up, and ordered them to sit down.
"He's just ad-libbing," Bailey said. "He can't see anything."
Nonetheless, Bailey said, the employees were so afraid they wired the caller $3,000. The manager even hung up the phone when authorities called, saying a bomb would go off if he talked to them.
Bailey said that in a phone call with police, the man even offered to trade a "hostage" for a police officer to make his threat more believable.
The caller has not gotten every store he's called to give up money, but the FBI on Wednesday did not provide the total amount taken.
On Tuesday, at a Dillons grocery store in Hutchinson, Kan., the caller also ordered women inside the store to take off their clothes, and 20 minutes later told the men to disrobe, too. Police there initially said they were investigating whether the caller had hacked into the surveillance system, but later rejected that possibility.
The calls continued Wednesday, with a threat at a Hannaford supermarket in Millinocket, Maine. An employee arrived to find the doors locked and employees and customers sitting inside in a circle, said Stephen McCausland, spokesman for the Maine Department of Public Safety.
Store maintenance associate Ivan Garay told the Bangor Daily News that store manager Michael Bennett told everyone to sit on the floor. Later, they were told there had been a bomb threat.
At a Safeway supermarket in Prescott, Ariz., a caller with an accent demanded $2,850 on Tuesday, according to police and city spokesman Kim Kapin.
"The maximum that Western Union can send through its service is $3,000," Kapin said. Wiring money also includes a $150 service charge, Kapin added. "This individual was obviously aware of that."
Initially, the caller led employees to believe he was observing them.
"After a while, it sounded like he was just taking a shot in the dark at what they might be doing, or what they looked like or how they were reacting to his call," Prescott police Lt. Ken Morley said.
Sherry Johnson, a spokeswoman for Western Union, said the company was working with the FBI and U.S. Secret Service to trace the money sent through the service. It was also telling its agents to be on the lookout for the extortion plot. She declined to be more specific, saying "this is an ongoing law enforcement investigation."
Kapin said the FBI found the call was made from a cell phone registered to a Los Angeles phone number but was leased out from a European company. Investigators determined the call had come from somewhere in Portugal.
Callers also tried to extort money with calls to bank branches at Wal-Marts in Salem, Va., and Fairlawn, Va., on Tuesday; to a Vons store in Vista, Calif., near San Diego, on Friday; and to two Giant Eagle grocery stores in the Pittsburgh area, authorities said. The FBI said it was also investigating similar incidents at a grocery store in Orem, Utah, on Monday and a store in McAllen, Texas, on Saturday.