New York City police are investigating an online posting that a convicted felon claims to have shot and robbed slain rapper Tupac Shakur.

The report was posted on the website AllHipHop.com and purports to be from a convicted felon named Dexter Isaac. In the post, Isaac claims he was paid by another hip hop mogul to rob Shakur outside a studio in Manhattan in 1994. Shakur suffered gunshot wounds but eventually recovered. He was later killed in 1996 in an unsolved slaying.

According to the Federal Bureau of Prisons website, Isaac is serving life in prison and is housed at the Metropolitan Detention Center in Brooklyn. NYPD spokesman Paul Browne says the department is looking into the posting, and if it is determined to be legitimately from Isaac they will seek to interview him.

An email message requesting comment from AllHipHop.com was not immediately answered.

[Editor's note: the original headline mistakenly implied Isaac claimed responsibility for Shakur's murder in 1996.]