Thirty-three people have been hurt after lightning struck twice at one of Germany's music festivals, Rock Am Ring 2015. Rock am Ring staff and concert-goers were hurt as lightning hit backstage and camping areas of the festival in Mendig. Rock Am Ring ends today with sets from Slipknot, Lamb Of God, Motörhead, In Flames and others with 90,000 fans expected at the event.

The festival in the town of Mendig, western Germany, was hit by two lightning strikes in the early hours of Saturday morning. The first strike hit the backstage area at about 1am, injuring eight people from the festival's production teams, according to police. Organisers later halted concerts and offered visitors shelter in large, lightning-proof tents.

Just before 4am, lightning struck for a second time, hitting the festival's camping area and injuring a further 25 people. Police said all of those injured had been taken to hospital for observation and were in good health. No one suffered a direct hit.