An album of lost solo recordings by the late Nirvana frontman Kurt Cobain is set to be released later this year.

The director of new documentary Kurt Cobain: Montage of Heck, Brett Morgan, has revealed plans to release the recordings that were discovered while researching the documentary film.

Speaking to Bedford + Bowery, Morgan said, "We’re going to be putting out an amazing album this summer... It will feel like you’re kind of hanging out with Kurt Cobain on a hot summer day in Olympia, Washington as he fiddles about. It’s going to really surprise people."

He added, "It’s not a Nirvana album, it’s just Kurt and you’re going to hear him do things you never expected to come out of him."