At least seven people, including six tourists, were killed and more than 100 others injured when a violent, short-lived storm lashed northern Greece overnight, felling trees and ripping off rooftops.
Witnesses said the storm had come and gone in a matter of minutes. Winds of over 100 kph (60 mph) were reported on the Halkidiki peninsula, popular with tourists in the summer.
A powerful, non-supercell tornado over water has caused damage after it hit the eastern shores of Istanbul on June 19.
The tornado, a rare occurrence for northwestern Turkey, was first seen over the Marmara Sea before passing through the Pendik and Tuzla neighborhoods in eastern Istanbul and reached the province of Kocaeli.