Major power cut hits Bosnia, Albania, Montenegro and Croatia's coast

FILE PHOTO: An electricity pylon along Albania's 400 kV power line with Montenegro is pictured in Vau Dejes, near the city of Shkoder April 9, 2014. REUTERS/Arben Celi/File Photo

BELGRADE (Reuters) - A major power blackout hit Montenegro, Bosnia, Albania and most of Croatia's Adriatic coast on Friday, officials said, disrupting businesses, shutting down traffic lights and leaving people sweltering in the middle of a heatwave.

Power operators in the four countries said they were investigating what caused the failure. Albania's Top Channel TV cited unnamed sources saying an interconnector had failed in Montenegro, though there was no official confirmation.