NEWPORT, R.I. — A bomb threat that caused the evacuation of a Wal-Mart and led employees to wire $10,000 to the caller appears to be part of a broader scam targeting other businesses around the country, authorities said.

An unidentified man called the Newport store Tuesday morning, saying he had a bomb and would harm employees. He also demanded that workers transfer $10,000 to an account, Sergeant James Quinn of the Newport police said. The store wired the money, Sergeant Quinn said.

An FBI spokesman, Rich Kolko, said the threat appears related to a plot in recent days targeting banks and stores near Phoenix, Detroit, Salt Lake City, and Philadelphia.

An anonymous caller made a bomb threat Tuesday against a Dillons grocery in Hutchinson, Kan., demanding that the store wire money to his bank account and ordering everyone in the store to disrobe. No one was injured and no money was paid, police said. Yesterday, two other stores in Hutchinson also received bomb threats, police Lieutenant Steven Nelson said.

Authorities said the caller Tuesday appeared to have visual access to the grocery store, although officials were investigating whether the caller was out of state and may have hacked into the store’s security system.

“If they can access the Internet, they can get to anything,” Chief Dick Heitschmidt of the Hutchinson police said. “Anyone in the whole world could have access, if that’s what really happened.”

The FBI was looking into whether the calls to the banks and stores were being placed from overseas and was compiling reports from local police departments to probe for similarities between the cases, Mr. Kolko said yesterday.

“At this point, there’s enough similarities that we think it’s potentially one person or one group,” Mr. Kolko said from Washington. Police in Virginia said a similar threat was made at a store there on Tuesday. In that case, no money was sent, and no bomb was found.

In Newport, the caller placed three separate calls to the store, Sergeant Quinn said. An employee reported the bomb threat to police at 6:52 a.m., minutes before the store’s scheduled opening.

Roughly 25 employees who were inside at the time were evacuated as a police SWAT team spent hours sweeping the building and bomb-sniffing dogs searched around cars in the parking lot. Neither the suspect nor any explosive device was found in the store, and no one was injured.

Sergeant Quinn said police have identified the account where the money was wired, but he would not say where it was held. He said the caller used a land line from out of state, but would not say from where. No arrests have been made.

A similar call was made to a bank inside a Wal-Mart store in western Virginia late Tuesday morning, police said. An employee at a bank branch inside a Wal-Mart store in Salem was told that a bomb would explode unless an undisclosed amount of money was sent via Western Union. The store was evacuated and later reopened after no bombs were found, police said.

Another bomb threat was called in a few minutes later to a bank inside a store in Virginia’s Pulaski County. That store was also evacuated and no bombs were found.