Luigi Mangione named as person of interest in shooting of UnitedHealthcare CEO Brian Thompson. He was arrested on PA gun charges.

• UnitedHealthcare CEO Brian Thompson was fatally shot Wednesday outside a Midtown Manhattan Hilton.
• On Monday, police arrested a man in Altoona, Pa., in connection with the shooting.
• The killing of the 50-year-old father of two had sparked a manhunt in New York City and beyond.

Police in Pennsylvania have arrested the person of interest in connection to the shooting death of UnitedHealthcare CEO Brian Thompson.

New York Police Department officials said at a press conference that 26-year-old Luigi Mangione was arrested 280 miles away in Altoona, Pennsylvania, on firearms charges.

"It does seem that he has some ill will toward corporate America," NYPD Chief of Detectives Joseph Kenny said at the press conference.

"Our investigation is leaning toward he was acting alone," Kenny said.

Investigators with the NYPD were traveling to Altoona on Monday, Commissioner Jessica Tisch said. He has not been charged in the killing.

The arrest follows a nearly week-long manhunt for a masked, slightly-built gunman who police say ambushed the 50-year-old father of two from Minnesota early Wednesday morning outside a Midtown hotel.

One or more tipsters called the police after spotting someone at a McDonalds who resembled the gunman, according to multiple news outlets. In the past week, police have circulated more than a half-dozen images of a suspect.

Kenny said at the press conference Mangione was eating at the McDonalds when an employee recognized him from photos.

Thompson was shot multiple times on a sidewalk in the heart of Manhattan in what the New York Police Department described as a "brazen, targeted attack."

Thompson was steps away from a side entrance to the New York Hilton Midtown hotel — where he was set to speak at UnitedHealth Group's investor conference — when a hooded gunman opened fire on him from behind.

The chief executive of the nation's largest health insurer was struck at least once in the back and at least once in the right calf, police said.

Surveillance footage showed the gunman firing his weapon as Thompson, wearing a blue suit jacket, walked several feet in front of him.

A law-enforcement source, who was not authorized to speak to the press, told Business Insider that the gun appeared to be equipped with a silencer and that the gunman "definitely knew" where Thompson was going to be.

The gunman fled the scene, first on foot and then on an electric bike, which he rode into Central Park, authorities said.

Shell casings and bullets found at the scene had the words "deny," "defend," and "depose" written on them, according to multiple reports citing unnamed sources. BI couldn't independently confirm these details.

In the aftermath of the attack, the NYPD offered a $10,000 reward for tips leading to the gunman's arrest, with the FBI offering a reward of up to $50,000 for information leading to his arrest and conviction.

This story is developing and will be updated.