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BERLIN — Clashes at a Kurdish cultural festival in southwestern Germany left 80 officers injured, police said. Thirty-one people were detained.

Police in the city of Mannheim said officers were pelted with stones, bottles of water and other objects Saturday afternoon after a security firm employed by organizers called them in to help deal with an argument over a teenager who had tried to get into the event with a banned flag. Officers used pepper spray.

The clashes lasted for about two hours. Police said 13 vehicles were damaged by stones, bricks and other projectiles.

One officer suffered rib injuries, and another 79 were lightly injured.

About 40,000 people were at the festival.

GREAT BRITAIN

Search ongoing at home of couple slain in Alps

LONDON — Police were searching for a second day the U.K. home of a British-Iraqi couple killed along with two other people while vacationing in the French Alps.

The search of Saad and Iqbal al Hilli’s home in the village of Claygate, a London suburb, is part of a French-led investigation into the case.

The couple and the two other people were each shot twice in the head. The couple’s two young daughters survived, with one in a medically induced coma for her wounds.

Police on Sunday continued their examination of the house in Claygate, with Surrey police confirming two firearms officers visited the scene.

French investigators also are in Britain for what prosecutors have warned will be a long and complex probe about who carried out the killings and why.

• From wire dispatches and staff reports