"Duck Boat" Company Suspending Tours Nationwide

Updated at 1:13 p.m.

A day after an amphibious "duck boat" full of tourists collided with a barge in Philadelphia, leaving two people missing, the tour company announced it was suspending operations nationwide.

Ride the Ducks, based in Norcross, Ga., also operates in San Francisco, Atlanta, Newport, Ky., and Branson, Mo. The company had already halted Philadelphia tours Wednesday. A Ride the Ducks operation in Seattle is independently owned and remained open for business Thursday.

"Our thoughts and prayers are with our Philadelphia tour guests, crew members and their families," the company said in a statement on its website. "We are attending to their needs first. In the interim, we have voluntarily suspended our Ride The Ducks operations nationwide.

Meanwhile, hope faded for finding two Hungarian tour boat passengers alive Thursday, a day after the amphibious craft they were riding in was struck and sunk by a barge in the Delaware River, spilling them and other passengers into the murky waters, searchers said.

The Hungarian government says two missing tour boat passengers were part of a group of 15 from that country who had traveled to Philadelphia to take part in a language course.

The Foreign Ministry said Thursday that the group left Hungary on July 2 and was due to return July 23. Consular official Agnes Klekot says the group included 13 students and two teachers from a high school in the western Hungarian city of Mosonmagyarovar.

She says three Hungarians were taken to a hospital with minor injuries, and were treated and released. Klekot declined to release the identities of the missing students, citing Hungarian law.

A search for the missing duck boat passengers resumed in the morning near Philadelphia's Penn's Landing, with boats searching the surface and using sonar, but conditions were too dangerous to send divers underwater Thursday.

Interviews with other passengers indicated the missing 16-year-old girl and 20-year-old man were members of a Hungarian tour group, officials said.

Visibility at the bottom of the Delaware River, where the boat was lying in about 50 feet of water, was nil, said Philadelphia police Lt. Andrew Napoli, speaking of his earlier dives.

"The vehicle is laying upright on its wheels," he said. "There could be bodies inside, we're not sure. ... With the currents being what they are, if it went down with bodies inside, the bodies could very well have been washed out of the vessel."

The 37 people aboard the six-wheeled duck boat were tossed overboard when the tugboat-pushed barge hit it after it had been adrift for a few minutes with its engine stalled, police said. Most were plucked from the river by other vessels in a frantic rescue operation that happened in full view of Penn's Landing, just south of the massive Ben Franklin Bridge connecting Philadelphia to New Jersey.

The duck boat, which can travel seamlessly on land and water, had driven into the river Wednesday afternoon and suffered a mechanical problem and a small fire, officials said. It was struck about 10 minutes later by a barge used to transport sludge.

Ten people were taken to a hospital; two declined treatment, and eight were treated and released, Hahnemann University Hospital spokeswoman Coleen Cannon said.

The National Transportation Safety Board said it planned to try to obtain any radio recordings, any possible mayday calls, photographs from witnesses or people aboard and other evidence as its investigators remain in Philadelphia over the next several days.

Investigators planned to try to figure out why the vessels collided and "how conspicuous would that duck have been" to the tugboat pushing the 250-foot-long barge, NTSB member Robert Sumwalt said. NTSB officials also hoped to conduct witness interviews, he said.

Divers found the duck boat in water about 50 feet deep, Police Commissioner Charles Ramsey said.