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Lady Gaga and Alexandra Burke collaborator RedOne says he is "in contact" with Michael Jackson's estate about potentially releasing material the pair worked on together.

The Swedish/Moroccan producer, whose real name is Nadir Khayat, spent a number of sessions with the singer writing new material before his death in June 2009 and says he may release it for charity.

He said: "It would only make sense for me to release it if it was for a cause that he would have been proud of.

"We are in contact with the estate and the lawyers just to figure out a way to do it in a good way."

The songwriter, who has collaborated with Little Boots and Kylie Minogue in the past, revealed he spent a number of sessions writing material with Jackson in Las Vegas during 2008 and 2009.

He explained that the recordings were somewhere where "nobody can reach them".

"One song [in particular] he was loving. We were supposed to record it in London whilst he was doing the tour."

He also paid tribute to the star saying: "It was an incredible feeling just to have experienced that. The sweetest person and most respectful person honestly that I've ever met in terms of artist.

"What he meant to you and me and everybody through life. It was just unbelievable, here he is sitting with me and making me feel like I'm so important and so talented."

Last month, Lenny Kravitz was forced to say he hadn't leaked a track that he'd collaborated on with Jackson.

Only one official posthumous single has been released so far by Jackson, This Is It.