Four U.S. soldiers were recovering Monday from wounds sustained when a carload of men hurled bombs and fired guns at a group of off-duty American servicemen in a discotheque parking lot, officials said.

Authorities had no suspects and were "intensively investigating" the attack early Sunday outside the Confetti disco in San Pedro Sula, said a police official who spoke on condition of anonymity.U.S. Embassy spokesman Charles Barclay said no group had claimed responsibility for the attack, which occurred at about 1 a.m. in Honduras' second-largest city.

Barclay, in a telephone interview, said the four soldiers wounded in the attack were hospitalized in satisfactory condition. Embassy officials refused to identify them until their families were notified.

A U.S. official, speaking on condition he not be identified, said the wounded men "were out of danger."

The soldiers were on leave from Palmerola Air Force Base, 41 miles northeast of the capital of Tegucigalpa, and were in civilian clothes and carrying no weapons at the time of the attack, Barclay said.

"The American soldiers were on a one-day recreation trip to San Pedro Sula," he said.

They were leaving the nightspot's parking lot in a civilian vehicle rented from a Honduran company when the attackers threw small bombs and opened fire from inside another car in the parking lot, U.S. officials said.

In Washington, Pentagon spokeswoman Maj. Kathy Wood said nine soldiers were attacked as they drove out of the discotheque's parking lot. She said there were 10 or 12 attackers.