The families of two Hungarian tourists killed in a duck boat accident on the Delaware River last month have filed a wrongful death lawsuit in Philadelphia.

Sixteen-year-old Dora Schwendtner and 20-year-old Szabolcs Prem were killed July 7 when a barge being pushed by a tug slammed into the stalled duck boat. The boat capsized and sank.

Lawyers for the victims' families say the suit was filed Tuesday, naming tour boat operator Ride the Ducks of Norcross, Ga., and others.

The suit seeks punitive damages and claims the deaths were senseless and preventable.

Ride The Ducks spokesman Bob Salmon says the company is always focused on safety.