Six tourists, including two young children, have been killed in a freak storm in Greece.

Trees and pylons were ripped up, vehicles overturned and a sea of debris strewn everywhere as the storm tore through the northern Halkidiki peninsula on Wednesday night.

A total of seven people were killed and about 140 more were injured, although most of them not seriously, police said.

Two elderly Czech tourists died after high winds overturned their vehicle, while an eight-year-old boy and his mother from Romania were killed when an outdoor restaurant’s lean-to roof collapsed.

A man and a young boy, both Russians, also died when a tree fell near their hotel.

Freak storm kills seven in Greece, including two children Show all 9 1 /9 Freak storm kills seven in Greece, including two children Freak storm kills seven in Greece, including two children Seven people, including two children, were killed after a storm swept through Halkidiki in northern Greece on 10 July 2019. Sakis Mitrolidis/AFP/Getty Images Freak storm kills seven in Greece, including two children People stand next to destroyed beach bars in Nea Plagia, in Chalkidiki, Northern Greece, on July 11, 2019. - Tornadoes and violent hailstorms killed six tourists in northern Greece late on July 10, 2019, police said. Dozens more were injured when strong winds hit the region of Halkidiki, near the city of Thessaloniki, authorities added. (Photo by Sakis MITROLIDIS / AFP)SAKIS MITROLIDIS/AFP/Getty Images SAKIS MITROLIDIS Sakis Mitrolidis/AFP/Getty Images Freak storm kills seven in Greece, including two children Two women rummage through rubbles of a destroyed beach bar in Nea Plagia, in Chalkidiki, Northern Greece, on July 11, 2019. - Tornadoes and violent hailstorms killed six tourists in northern Greece late on July 10, 2019, police said. Dozens more were injured when strong winds hit the region of Halkidiki, near the city of Thessaloniki, authorities added. (Photo by Sakis MITROLIDIS / AFP)SAKIS MITROLIDIS/AFP/Getty Images SAKIS MITROLIDIS Sakis Mitrolidis/AFP/Getty Images Freak storm kills seven in Greece, including two children A picture taken on July 11, 2019 shows the tavern where a woman from Romania and her child died when the roof caved in after a storm in Nea Plagia, in Chalkidiki, Northern Greece. - Tornadoes and violent hailstorms killed six tourists in northern Greece late on July 10, 2019, police said. Dozens more were injured when strong winds hit the region of Halkidiki, near the city of Thessaloniki, authorities added. (Photo by Sakis MITROLIDIS / AFP)SAKIS MITROLIDIS/AFP/Getty Images SAKIS MITROLIDIS Sakis Mitrolidis/AFP/Getty Images Freak storm kills seven in Greece, including two children TOPSHOT - Tourists walk past a fallen roof coverd in solar panels after a storm in Nea Plagia, in Chalkidiki, Northern Greece, on July 11, 2019. - Tornadoes and violent hailstorms killed six tourists in northern Greece late on July 10, 2019, police said. Dozens more were injured when strong winds hit the region of Halkidiki, near the city of Thessaloniki, authorities added. (Photo by Sakis MITROLIDIS / AFP)SAKIS MITROLIDIS/AFP/Getty Images SAKIS MITROLIDIS Sakis Mitrolidis/AFP/Getty Images Freak storm kills seven in Greece, including two children TOPSHOT - A picture taken on July 11, 2019 shows damaged umbrellas and lounge chairs on a beach after a storm in Nea Plagia, in Chalkidiki, Northern Greece. - Tornadoes and violent hailstorms killed six tourists in northern Greece late on July 10, 2019, police said. Dozens more were injured when strong winds hit the region of Halkidiki, near the city of Thessaloniki, authorities added. (Photo by Sakis MITROLIDIS / AFP)SAKIS MITROLIDIS/AFP/Getty Images SAKIS MITROLIDIS Sakis Mitrolidis/AFP/Getty Images Freak storm kills seven in Greece, including two children People search and clean after a storm at Sozopoli village in Halkidiki region, northern Greece, Thursday, July 11, 2019. A search and rescue operation is underway in northern Greece for a fisherman missing after a powerful storm left six people dead, including two children, and injured more than 100. (Vassilis Konstantopoulos/InTime News via AP) Vassilis Konstantopoulos Vassilis Konstantopoulos/InTime News via AP Freak storm kills seven in Greece, including two children Workers check the damages at a gas station after a storm at Nea Potidea village in Halkidiki region, northern Greece, Thursday, July 11, 2019. A search and rescue operation is underway in northern Greece for a fisherman missing after a powerful storm left six people dead, including two children, and injured more than 100. (Giannis Moisiadis/InTime News via AP) Giannis Moisiadis Giannis Moisiadis/InTime News via AP Freak storm kills seven in Greece, including two children TOPSHOT - A caravan overturned by strong winds lies on a beach where a storm killed a Czech couple in Nea Plagia, in Chalkidiki, Northern Greece, on July 11, 2019. - Tornadoes and violent hailstorms killed six tourists in northern Greece late on July 10, 2019, police said. Dozens more were injured when strong winds hit the region of Halkidiki, near the city of Thessaloniki, authorities added. (Photo by Sakis MITROLIDIS / AFP)SAKIS MITROLIDIS/AFP/Getty Images SAKIS MITROLIDIS Sakis Mitrolidis/AFP/Getty Images

A body found at sea was identified as that of a missing fisherman.

The 62-year-old’s body was located by an air force helicopter 6.8 nautical miles off the coast.

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Government spokesman Stelios Petsas said 23 people remained in hospital on Thursday, including one woman who was in a critical condition in intensive care.

A state of emergency was declared in the region, a three-finger peninsula near the northern city of Thessaloniki popular with tourists in the summer.

Crews were working to restore power on Thursday after it was knocked out for 80 per cent of the area.

Meanwhile the fire department said it had received more than 1,200 requests for help, including for rescues, to cut fallen trees and pump water from flooded basements.

Prime minister Kyriakos Mitsotakis, who was elected on Sunday and had just formed his government, appointed public order minister Michalis Chrisochoidis to head the response effort while the army was assisting repair crews.