A 60-year-old man and a 32-year-old woman, both of Philadelphia, were found dead Saturday night on a ramp to I-95 in Bucks County in what police are calling a murder-suicide.

Pennsylvania State Police provided the following account:

About 5:30 p.m. Saturday, a trooper responded to a report of a woman running against northbound traffic on I-95 near Woodhaven Road. Once there, the trooper found a silver SUV registered to Maria Choo Lin Choo parked on the northbound shoulder of the highway with its hazard lights on. He also heard what appeared to be two gunshots coming from the area of the vehicle.

Closer to the SUV, the trooper found David Choo Lin Choo lying on top of Maria Choo Lin Choo. Both were dead and had been shot. The bodies were outside the vehicle, where the on-ramp from Woodhaven Road to northbound I-95 and the on-ramp from the Cornwells Heights park-and-ride lot to the highway merge.

David Choo Lin Choo had a semi-automatic handgun in his right hand. Autopsies determined he died from a self-inflicted gunshot wound, and Maria Choo Lin Choo died from multiple gunshot wounds to the body.

Police did not say whether the two were related.