Gunman at Large After Fatally Shooting 3 in Pennsylvania Township, Police Say

Three people were fatally shot on Saturday morning in Falls Township in Pennsylvania, according to the authorities, who warned that the gunman remained at large and urged residents to shelter in place and some venues and shops to close.

The gunman, identified by the authorities as Andre Gordon, 26, drove a stolen vehicle and killed two people at the residence in Levittown, Pa., the Falls Township Police said, citing what they said were their preliminary findings. They said they responded to reports of a shooting around 9 a.m.

Mr. Gordon then shot and killed another person in nearby Morrisville before fleeing to a Dollar General parking lot, the authorities said.

He then stole a car at gunpoint there and was last seen driving the car, a dark gray Honda, the police said. The carjacking victim was not injured, the police said.

The police warned that Mr. Gordon was armed with an assault rifle and was believed to be in possession of other weapons.

Mr. Gordon knew the victims of the shooting, the police said, adding that they believed he had ties to the area around Trenton, N.J., which is about 20 minutes away.

The authorities in neighboring townships also directed Sesame Place, a theme park in Bucks County, Pa., to close as a precaution and other shops followed suit on Saturday.

“This is a fluid situation, and we are asking the community to take some precautions,” the Middletown Township police said, warning residents to avoid travel to Falls Township until further notice.

The authorities in Bucks County urged residents in Falls Township and neighboring areas to shelter in place and said they were helping the police in “an active investigation.”

This is a developing story.