Updated

An international team of investigators announced Wednesday that there are "strong indications" Russian President Vladimir Putin was the person who approved the supply of anti-aircraft weaponry to Ukrainian separatists who shot down Malaysia Airlines Flight 17 in 2014, killing all 298 onboard. 

The Joint Investigation Team, made up of experts from the Netherlands, Australia, Malaysia, Belgium and Ukraine, has been examining the crew of the missile system and those who ordered its deployment in Ukraine.  

MH17 was traveling from Amsterdam to Kuala Lumpur in Malaysia on July 17, 2014, when it was shot out of the sky. 

Dutch prosecutors said in their summary of investigation findings Wednesday that "there are strong indications that the Russian president decided on supplying" a Buk missile system to Ukrainian separatists. A Buk system from the Russian military's 53rd Anti-Aircraft Missile Brigade, based in the city of Kursk, was used to bring down MH17. 

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MH17 crash site in Ukraine

People walk among the debris at the crash site of Malaysia Airlines Flight 17 near the village of Grabovo, Ukraine, on July 17, 2014. (AP/Dmitry Lovetsky)

But prosecutor Digna van Boetzelaer said that without Russian cooperation in the probe, "the investigation has now reached its limit. All leads have been exhausted." 

The announcement comes nearly three months after a Dutch court convicted two Russians and a Ukrainian rebel for their roles in shooting down the plane. One Russian was acquitted by the court. 

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Putin accused of role in attack on MH17

Russian President Vladimir Putin, shown left during a meeting in Moscow on Tuesday, is accused of signing off on the supply of weaponry that was used to shoot MH17 out of the sky in July 2014. (AP/Mikhail Klimentyev/Sputnik/Kremlin Pool Photo/Dmitry Lovetsky)

None of the suspects appeared for the trial and it was unclear if the three who were found guilty of multiple murders will ever serve their sentences. 

The convictions and the court's finding that the surface-to-air Buk missile came from a Russian military base were seen as a clear indication that Moscow had a role in the tragedy. Russia has always denied involvement. The Russian Foreign Ministry accused the court in November of bowing to pressure from Dutch politicians, prosecutors and the news media. 

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MH17 investigative team announces findings

From left: David McLean, Australia; Asha Hoe Soo Lian, Malaysia; Eric van der Sypt, Belgium; and Oleksandr Bannyk, Ukraine, are seen during the Joint Investigation Team news conference in The Hague, Netherlands, on Wednesday. (AP/Peter Dejong)

The convictions held that Moscow was in overall control in 2014 over the self-proclaimed Donetsk People’s Republic, the separatist area of eastern Ukraine where the missile was launched.  

As well as the criminal trial that was held in the Netherlands, the Dutch and Ukrainian governments are suing Russia at the European Court of Human Rights over its alleged role in the downing of MH17. 

The Associated Press contributed to this report.