Brian Thompson, the CEO of UnitedHealth Group‘s insurance unit, was fatally shot in midtown Manhattan on Wednesday morning, a person familiar with the matter told CNBC.

UnitedHealth Group canceled its investor day after reports of the shooting emerged. Thompson led UnitedHealthcare, the largest private health insurer in the United States

Police are investigating the shooting as a targeted attack, the person said.

A spokesman for the New York Police Department’s Assistant Commissioner for Public Information confirmed that a 50-year-old man was shot in midtown Manhattan at 6:46 a.m. ET on Wednesday. However, the spokesman did not confirm the man’s identity.

The spokesman said the man was taken to Mount Sinai West Hospital in critical condition and was pronounced dead. No arrests have been made and an investigation is ongoing, they added.

UnitedHealth Group held its investor day at New York’s Hilton Hotel in Midtown. UnitedHealth Group did not immediately respond to a request for comment.

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