A Southwest Airlines flight headed to Connecticut made an emergency landing here after a person who missed the flight allegedly made a bomb threat, an airline spokeswoman said Sunday.

No explosives were found, and the 137 passengers on Flight 1018 continued on to Hartford, Conn., after the unexpected layover of just over three hours, spokeswoman Christi Day said.

Day said the passenger who missed the flight made a statement about a bag and then made a bomb threat specific to Flight 1018. Day said she didn't know whether the threat was made to a gate agent in Las Vegas or by telephone.

Day had no additional information on the passenger. Las Vegas police, who assist with security at McCarran International Airport, did not immediately return a phone message from The Associated Press.

The threat was made at 8:40 p.m. CST, Day said, and the plane landed in Omaha about an hour later.

Passengers were bused to a field maintenance building while security personnel using bomb-sniffing dogs searched passenger and baggage compartments. Individual pieces of luggage also were searched on the tarmac.

Passengers went through a security screening before reboarding.

Southwest Airlines is based in Dallas.