Fairfax Media/Global Voices Julian Simpson, far right, was Australia's second secretary to the United Nations.

Australian U.N. diplomat Julian Simpson, 30, has fallen to his death in a tragic incident following a night out with his wife and friends. Reports suggested Simpson slipped off a rail on the balcony of at his Lower East Side apartment. According to Fairfax Media, the tragic accident happened around 1:40am after a group of ten people gathered at the Simpson's Cooper St apartment for drinks after a night out at a local restaurant.

An Australian diplomat has died after falling from a balcony in New York. #9Newspic.twitter.com/nFVyePpCQ7 — Nine News Australia (@9NewsAUS) November 15, 2017

An NYPD spokesman told Fairfax Media the friends have been interviewed extensively throughout the night. "Upon investigation, it was determined that... he sat on the balcony railing and lost his balance and fell off," the spokesman said. "No criminality is suspected at this time and the investigation is ongoing," the NYPD spokesman said.

Breaking: An Australian diplomat has plunged to his death celebrating the SSM result in New York. @mikeamor7#JulianSimpson#7Newspic.twitter.com/FuVWvVmlEG — 7 News Sydney (@7NewsSydney) November 15, 2017

He has disputed a story that the friends had been playing a 'trust game' before the accident. However, The New York Post has reported that the game had been played just before Simpson's fall from the seventh floor apartment.

Fairfax Media Julian Simpson, far right, at a conference in Ecuador.

Simpson and his friends apparently went to the rooftop of their apartment block to enjoy the view of the Empire State Building, which had been lit up in rainbow colours to celebrate Australia's vote for same-sex marriage. According the the Post, Simpson climbed to a higher roof landing where he picked up and swung a female friend around. When he put her down, the group went back inside where the husband of the woman confronted Simpson over the appropriateness of his behaviour.

Look what the Empire State Building in NYC did for #MarriageEquality Australia today 🇦🇺🏳️‍🌈❤️ Beautiful! Thankyou ❣️ pic.twitter.com/VMKX3BFs0U — Chloe 🌈 (@StrayaCamilizer) November 15, 2017

The Post reports that the men stepped out onto the balcony, where Simpson assured the man he meant no harm to his wife. It was then that Simpson, according to the Post, allegedly played a 'trust game' where he would lean back on the ledge, trusting that the man would catch him before he fell.

Fairfax Media The Lower East Side apartment building in Manhattan, where Australian diplomat Julian Simpson fell to his death.