However, the photos do not show anything new that might change the ruling of Cobain's death as a suicide, Seattle Det. Renee Witt said.
Media reports initially indicated Thursday that police are reopening the case, but the police department has since quelled those rumors.
"Not even close," Witt said.
However, a cold case detective is reviewing the details in order to field renewed media interest as the anniversary approaches.
Cobain was found dead in his Seattle home April 8, 1994, but investigators believe he died days earlier, about April 5.
Conspiracy theories have called Cobain's suicide into question, but investigators have not reopened the case since the time of his death.
Nonetheless, Cobain's death continues to receive attention from fans who don't believe Cobain killed himself.
Meanwhile, Rolling Stone reports a Portland Nirvana fan seeks to raise enough money to buy Cobain's childhood home in Aberdeen and turn it into a museum.
Though valued at $67,000, Cobain's mother listed it for sale last fall for $500,000.
As of about midday Thursday, the 18-day-old campaign had raised $250 out of its $700,000 goal.