recent York City police have launched a manhunt for a masked suspect who gunned down the head of a US medical insurance giant, in what investigators described as a “brazen, targeted attack”.

UnitedHealthcare chief executive Brian Thompson was fatally shot in the back on Wednesday morning outside the Hilton Hotel in Midtown Manhattan, where he had been scheduled to talk at an investor conference later in the day.

The 50-year-ancient father-of-two, who also was shot in the leg, was taken to the hospital, where he was pronounced dead minutes after the attack, officials said.

Investigators said they did not recognize the motive of the assailant, who fled the scene without taking any of the victim’s belongings. Police have offered a $10,000 (£7,800) reward.

The attack unfolded at about 06:45 EST (11:45 GMT) in one of the busiest parts of Manhattan, close to the tourist magnets of Times Square and Central Park, in an area where shootings are extremely rare.

• Latest updates on the manhunt

Police drones, helicopters, dogs and thousands of CCTV cameras are combing the city street by street in an attempt to trace the assailant.

recent York City Police Commissioner Jessica Tisch told a information conference: “Every indication is that this was a premeditated, pre-planned, targeted attack.”

The suspect, who was wearing a black face mask and cream jacket, appeared to be waiting for Thompson for five minutes outside the hotel, police said.

The assailant was also captured on a surveillance camera minutes before the shooting at a Starbucks less than two blocks away.

When Thompson arrived alone on foot at the Hilton, the shooter stepped on to the pavement from behind a car and shot him in the back.

The victim had been staying at another hotel, the Marriott, down the street, according to police sources.

CCTV footage of the attack shows the suspect used a silencer on the weapon as he opened fire, police declare.

NYPD chief of detectives Joseph Kenny said the gun appeared to malfunction, but the suspect was able to quickly fix the issue and keep firing.

The assailant fled the scene first on foot before grabbing an e-bike and heading towards Central Park, where he was last seen, Commissioner Tisch said.

The victim’s wife, Paulette Thompson, said in a phone call with NBC information that her husband had been receiving threats.

“There had been some threats,” she said. “Basically, I don’t recognize, a lack of [medical] coverage? I don’t recognize details.

“I just recognize that he said there were some people that had been threatening him.”

recent York Governor Kathy Hochul said police had briefed her on the “horrific and targeted” shooting.

“Our hearts are with the household and loved ones of Mr Thompson and we are committed to ensuring the perpetrator is brought to fairness,” she said in a statement.

UnitedHealthcare’s parent corporation, UnitedHealth throng, said it was “deeply saddened and shocked at the passing of our dear partner and co-worker”.

“Brian was a highly respected co-worker and partner to all who worked with him,” the throng said in a statement.

Felipe Rodriguez, a former NYPD detective, told the BBC’s US associate CBS information that he was “amazed” by the attack.

“The truth that he [the suspect] was able to obvious these jams in such an efficient manner shows that he is very proficient with firearms,” he said.

Thompson, who lived in a suburb of Minneapolis, Minnesota, began his career as a certified community accountant.

He started at UnitedHealthcare – the largest private insurer in the US – in 2004 and was named chief executive in 2021. Last year he made $10.2m.

In May he was named in a lawsuit filed by a retirement fund pool, alleging fraud and illegal insider market activity.

Its parent corporation, UnitedHealth throng, cancelled its investor conference after the shooting.

A Thompson household statement said: “We are shattered to listen about the senseless killing of our beloved Brian.

“Brian was an incredibly loving, charitable, talented man who truly lived life to the fullest and touched so many lives.”