World leaders from Vladimir Putin to President Obama have condemned the killing of Russian ambassador to Turkey Andrei Karlov, with some calling it an act of terrorism — but at least one conspiracy theory has emerged suggesting the entire event was staged and never happened.

On Monday, Karlov was shot and killed at an art galley. The shooter was apparently a 22-year-old off-duty police officer later identified as Mevlut Mert Altintas.

Video of the scene showed the shooter yelling, "Don't forget Aleppo, don't forget Syria!" Soon after the attack, a Turkey news agency reported that Altintas was "neutralized," or killed.

Some, however, have doubts that the assassination even happened. Reddit user Rigged_Election wrote a post on the site entitled, "The Russian ambassador assassination is fake, and I have evidence to prove it."

He and a reported "team of experts" analyzed a video of the shooting:

"Ballistics expert has told me these rounds sound like BLANKS," he said. He claims there are also no sounds of shell casings hitting the floor.

See photos from the attack

8 PHOTOS Russian ambassador Andrei Karlov killed in art gallery shooting See Gallery Russian ambassador Andrei Karlov killed in art gallery shooting FILE PHOTO - Russian Ambassador to Turkey Andrei Karlov accompanies Russian President Vladimir Putin (not seen), who disembarks from the Presidential aircraft at Ataturk airport in Istanbul, Turkey, October 10, 2016. REUTERS/Osman Orsal/File Photo North Korean leader Kim Jong-il (front C) poses with Russia's Ambassador to North Korea Andrei Gennadiyevich Karlov (front R) and other embassy members during a photo session at the Russian embassy in Pyongyang March 8, 2005, in this photo released in Tokyo March 11, 2005. Kim visited the Russian Embassy on Tuesday to receive a medal, presented to him on behalf of Russian President Vladimir Putin, Korea Central News Agency reported on Tuesday. JAPAN OUT REUTERS/Korea News Service IK/CN FILE PHOTO: Andrei Gennadiyevich Karlov poses during a photo session at the Russian embassy in Pyongyang, North Korea, March 8, 2005, in this photo released in Tokyo March 11, 2005. JAPAN OUT REUTERS/Korea News Service/File Photo TPX IMAGES OF THE DAY ANKARA, TURKEY - (ARCHIVE) : A file photo dated November 30, 2016 shows Russian Ambassador to Turkey, Andrei Karlov (C) during an exclusive interview in Ankara, Turkey. Russian Ambassador to Turkey Andrei Karlov has been shot multiple times at an exhibition in Ankara on December 19, 2016. Karlov was delivering a speech at the opening ceremony of a photo exhibit when an armed assailant opened fire on him. The envoy was seriously wounded and was taken to hospital immediately. (Photo by Ali Balikci/Anadolu Agency/Getty Images) An ambulance leaves the area near an art gallery where the Russian Ambassador to Turkey Andrei Karlov was shot in Ankara, Turkey, December 19, 2016. REUTERS/Umit Bektas ANKARA, TURKEY - DECEMBER 19: Turkish police secure the area outside where the Russian Ambassador to Turkey Andrei Karlov was shot inside an art gallery on December 19, 2016, Turkey in Ankara. Russian foreign ministry confirmed the death of envoy Andrei Karlov in the attack at the gallery in the Turkish capital on Monday by a gunman shouting 'Don't forget Aleppo! Don't forget Syria'. (Photo by Erhan Ortac/Getty Images) Pictured in this file image dated December 1, 2016 are Russian Foreign Minister Sergei Lavrov (L) and Russia's Ambassador to Turkey Andrei Karlov at a meeting of the Russian-Turkish Joint Strategic Planning Group (JSPG) at the Rubi Platinum Hote in Alanya, Turkey. File Photo/Alexander Shcherbak/TASS (Photo by Alexander Shcherbak\TASS via Getty Images) ANKARA, TURKEY - DECEMBER 19: Signs direct traffic as Turkish police secure the area outside where the Russian Ambassador to Turkey Andrei Karlov was shot inside an art gallery on December 19, 2016, Turkey in Ankara. Russian foreign ministry confirmed the death of envoy Andrei Karlov in the attack at the gallery in the Turkish capital on Monday by a gunman shouting 'Don't forget Aleppo! Don't forget Syria'. (Photo by Erhan Ortac/Getty Images) Up Next See Gallery Discover More Like This HIDE CAPTION SHOW CAPTION of SEE ALL BACK TO SLIDE

The "flash of light" coming from the ambassador, Rigged_Election argues, is not an exit wound:

Credit: Reddit

"I would like to get a forensic analysis on the audio of these shots to see if they are actually special effects or not," Rigged_Election said. "There is also no sound of the bullets hitting him."

According to Rigged_Election, the "most important" factor of the incident is the lack of blood:

Credit: Reddit

Rigged_Election claims that the "stunt" was an attempt to keep the Middle East unstable and for more tension to lay on Russia, Turkey, NATO, and Syria.

Witnesses, however, have spoken publicly about the alarming scene. Associated Press photographer Burhan Ozbilici was not only in attendance, but shot photographs the entire time.

"I was, of course, fearful and knew of the danger if the gunman turned toward me," he said in a blog posted by AP. He commented on watching a life -- Karlov's -- "disappear" before his eyes.

Ozbilici spoke of others at the scene as well. "People screamed, hid behind columns and under tables and lay on the floor," he said. Other anonymous witnesses confirmed the shooting, and said that Altintas claimed to be Karlov's bodyguard prior.

These accounts reject Rigged_Election's theory, which has not been supported by any credible organizations as of Tuesday afternoon.