An earthquake registering 5.6 magnitude shook the central United States on Saturday.
The quake was centred in Oklahoma but was felt into several neighbouring states. Reported damage was minimal, with no known casualties.
The US Geological Survey said the epicentre, about 6.6 kilometres underground, was north-west of Pawnee, Oklahoma, about 120 kilometres north-east of Oklahoma City. There were reports of toppled shelves and damaged brick buildings near the epicentre.
The quake was described as the strongest in Oklahoma history.