Siege in New Jersey after US gunman kills three in Pennsylvania

A suspected gunman in a series of deadly shootings in Pennsylvania has barricaded himself inside a home in neighbouring New Jersey, police said.

US police said the suspect shot three people dead in Falls Township on Saturday before fleeing across state lines to the home in nearby Trenton.

Residents were home when the suspect entered the house but they have since been safely evacuated, police added.

The suspect is believed to be a 26-year-old who was known to the victims.

He was named as Andre Gordon Jr by authorities.

According to Philadelphia’s Middletown Township Police, the suspect is thought to be homeless, but primarily stays in the Trenton area.

People related to the suspect were among the victims in Falls Township, including a child, Philadelphia’s Bucks County District Attorney Jennifer Schorn told a news conference.

The Bucks County DA’s Office said that following the shootings, Gordon carjacked an individual at a dollar store before making his way to the home in Trenton, where he has barricaded himself.

Dramatic images captured the police response to the siege in Trenton, and appeared to show hostages climbing out a first floor window before being cared for by police.

The weapon used by the suspect is believed to be an AR-15-style assault rifle, officials told a news conference in Falls Township.

Police lifted a stay-at-home order for Falls Township after several hours following the first reports of a shooting.