Police execute search warrant as part of long-running investigation into the murder of Tupac Shakur

Police have served a search warrant in the US state of Nevada as part of their ongoing investigation into the murder of Tupac Shakur.

The rapper was horribly gunned down in Las Vegas back in 1996.

Tupac was leaving a Mike Tyson boxing match at the MGM Grand Hotel and Casino on September 7 when an unknown assailant pulled up beside him and opened fire.

He was inside a vehicle at a red light when he was shot multiple times, including once in the chest.

Suge Knight, the boss of 2Pac's label Death Row Records, was also in the car at the time of the attack.

Tupac was rushed to a hospital, however was pronounced dead six days later.

The incident sent shockwaves around the world as the music industry lost one of its most powerful voices.

2Pac was only 25 years old at the time.

Authorities have been unable to find the killer ever since and, thankfully, the state doesn't have a statute of limitations when it comes to murder investigations.

Police spokesperson Aden OcampoGomez said they can't provide any more information as it is an open investigation.

Officials can't reveal whether the search warrant was performed at a home, business or other type of property.

Suge Knight Jr. doubled down on his suggestions in January 2019 - posting that Tupac was 'back in the studio' with 'new music coming'.

"Everybody was like, ‘What's going on?’ I went and got 200,000 followers within two days. And I was like, ‘Wow, like this is, this is crazy. Germany's calling me [to do interviews], and I don't even speak German’.

"So, I don't even know what to do. Pretty much the reason why I did it, there's a purpose for it, and you actually have to tune into the show to see why."

However, he hasn't been able to show any evidence this is the case.