Stars kick off Roskilde festival

Snoop Dogg recently had his first number one single in the US

US rap star Snoop Dogg is among the musicians set to perform at this year's Roskilde festival in Denmark.

The artist - real name Calvin Broadus - will feature alongside headline act Black Sabbath, Beach Boys' Brian Wilson and British jazz musician Jamie Cullum.

An annual event since 1971, the festival near Copenhagen was inspired by the 1969 Woodstock festival.

Norway's Royksopp, US rock band Green Day and Duran Duran will also perform at the event, which ends on 3 July.

Britain's Jamie Cullum will also perform at the four-day event

Previews for northern Europe's largest rock festival began on 26 June, with some fans camping at the dedicated site for the entire week.

The official four-day event begins on Friday.

Tickets cost 170 Euro (£114) for the festival which regularly attracts more than 75,000 visitors from around the world.

The festival was the scene of tragedy in 2000 when a stampede led to the death of nine people.

A police inquiry subsequently found that safety precautions at the festival had been sufficient on the day of the tragedy.

However, organisers have since made radical changes to improve security and crowd safety.