Julia Hyman was gunned down when Tamura stormed the ritzy Park Avenue office tower where she worked on Monday evening, the sources said.

Hyman, a 2020 Cornell graduate, met her end when the gunman mistakenly took the elevator to the 33rd-floor offices of Rudin Management, where she was an associate, according to the sources and her LinkedIn profile.

Follow The Post’s live blog for the latest coverage of the 345 Park Ave. shooting

Investigators believe Tamura had been trying to target the NFL offices, which are located on the building’s lower floors.

Three others were also killed, including Blackstone exec Wesley LePatner — a married mom of two — and NYPD officer Didarul Islam, whose wife is due to soon give birth to their third child. The third, a security guard shot in the lobby, has yet to be identified.

The maniac, who drove from Las Vegas to attack the NFL HQ, ended his rampage by shooting himself, cops said.

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