Dusseldorf, Oct 30 (DPA) A live hand grenade was discovered at a cinema showing the documentary of the last days of Michael Jackson's life, police said Friday.

A cleaner at Kinowelt in Dusseldorf found the Yugoslav-made grenade on a seat while tidying up after the movie "This Is It" Thursday evening.

Police evacuated the multiplex after the discovery and searched the premises with six sniffer dogs, but found no more suspicious objects.

Experts were examining the hand grenade, which was wrapped in a serviette, to see if they could determine who left it there.