New Cobain death scene photos released

New photos from the scene of Kurt Cobain's 1994 death have been released showing a spoon, a cigarette, cash and other paraphernalia.

Seattle police have released previously unseen images from the scene of rocker Kurt Cobain's death. (AAP)

With the 20th anniversary of the suicide of Kurt Cobain in April, Seattle police knew they would be getting plenty of questions about the Nirvana frontman.

So a detective reviewed the case files - including evidence photos and statements. He found no new information to change the police conclusion that Cobain took his own life, but did discover four rolls of undeveloped film from the suicide scene.

Late on Thursday, Seattle police released two previously unseen images from those rolls. One showed a box containing drug paraphernalia, a spoon and some things that look like needles on the floor next to half a cigarette and sunglasses. The other showed the paraphernalia box closed, next to cash, a cigarette pack and a wallet that appears to show Cobain's identification.

"There was nothing earth-shattering in any of these images," police spokeswoman Renee Witt said. "The detective went into the case files to refresh himself. The outcome of the case has not changed."

Cobain's body was discovered in Seattle on April 8, 1994. An investigation determined that days earlier Cobain had gone into the greenhouse of his large home and taken a massive dose of heroin. He then killed himself with a 20-gauge shotgun.

Earlier that year, Cobain had tried to kill himself in Rome by taking an overdose of tranquillisers.

Cobain, who was aged 27 when he died, sold millions of albums with Nirvana and helped popularise the heavy, muddy "grunge" rock in America's Pacific Northwest, along with bands such as Pearl Jam, Soundgarden, Alice in Chains and Mudhoney.

Cobain grew up in the logging town of Aberdeen, Washington, about two hours southwest of Seattle. After he died thousands of young people converged on Seattle Centre, near the Space Needle, for a public memorial.

Though his death was ruled a suicide some refused to believe that, leading to conspiracy theories that Cobain had been killed.

In a statement on the Seattle Police Department's online blotter, the detective who re-examined the case dismissed that speculation.

"Sometimes people believe what they read - some of the disinformation from some of the books, that this was a conspiracy. That's completely inaccurate," said Detective Mike Ciesynski, who found the four rolls of undeveloped crime scene photos. "It's a suicide. This is a closed case."