Dec 4 (Reuters) - Brian Thompson, the CEO of

UnitedHealth's ( UNH ) insurance unit, was fatally shot in the

chest on Wednesday morning outside the Hilton hotel in Midtown,

the NY Post and Bloomberg reported, citing police sources.

UnitedHealth ( UNH ) did not immediately respond to a

Reuters request for comment.

The company was hosting its investor day on Wednesday,

which was closed before time due to "a very serious medical

situation" with one of its team members, UnitedHealth ( UNH ) CEO Andrew

Witty said.

The NYPD deputy commissioner's office said a male was

shot in front of 13356, Avenue within the confines of the

Midtown North Precinct.

He was transported to Mount Sinai West in critical

condition when he was later pronounced dead, the NYPD said.

There are no arrests at this time, and the investigation

is active and ongoing. The identification of the dead person now

is pending proper family notification, the department said.