Four people were killed and a fifth was injured in a mass shooting at a Midtown Manhattan office building on Monday.

Wesley LePatner, 43, was among the four people killed by a gunman who stormed the Park Avenue building where she worked on Monday.

Investment giant Blackstone Inc said on Tuesday that a senior executive was among the people killed when a gunman, carrying an assault rifle, walked into the lobby of a midtown Manhattan office building and opened fire on Monday.