What we know:

• The head of US insurance company UnitedHealthcare was shot and killed  in what New York City police called a “targeted attack”
• Brian Thompson was fatally shot in the back and leg around 6:45 EST (11:45 GMT) on Wednesday morning outside the Hilton hotel in Midtown Manhattan
• A suspect, wearing a distinctive grey backpack, fled the scene and remains at large, the New York Police Department said
• Thompson, head of the largest private insurer in the United States lives in Minnesota
• He was in New York to speak at an investor conference later in the day, which has since been cancelled

Tourists visiting Manhattan, where Brian Thompson was killed, have been reacting to his shooting.

One tells the news agency Reuters “it’s terrible, absolutely awful”.