Seven people, including six tourists, have been killed in a violent storm that swept across a region of northern Greece on Wednesday night.

Gale-force winds, heavy rain and hailstorms lashed Halkidiki, near the city of Thessaloniki.

A Czech couple died when their caravan was blown away, and two Romanians and two Russians also died. A seventh body was later found in the sea.

Officials say at least 100 others were injured, with 23 people hospitalised.

A state of emergency has been declared, with dozens of rescue workers dispatched to help.