At least 13 hurt in shooting at Oklahoma campground party

No arrests made, police say, and site of shooting – a heavily wooded area – is slowing search for evidence and suspect

At least 13 people were hurt in a mass shooting during a party at a campground in Oklahoma on Sunday night, authorities said.

The shooting took place at Spring Creek Park on Arcadia Lake about 15 miles north-east of downtown Oklahoma City, when gunfire erupted during a gathering of young people at about 9pm.