A manhunt is underway for the killer of UnitedHealth CEO Brian Thompson, who was gunned down early Wednesday morning outside of a Midtown Manhattan hotel.

Brian Thompson, 50, was fatally shot by a masked gunman, who remains on the loose, outside the Hilton Hotel in Midtown Manhattan, police say

UnitedHealth Group CEO Brian Thompson was shot and killed by a masked gunman in midtown Manhattan early Wednesday morning, according to multiple reports.