Twelve people have died after a bus plunged into the water in southern Russia's Krasnodar Territory, a regional emergency service source told.

Axar.az reports citing Sputnik that, according to the source, the bus with 35 people fell into the sea near the village of Volna in Krasnodar region's Temryuk district. Twelve people were confirmed dead, while 20 were rescued. The rest three remain missing.

The bus was carrying construction workers of the "Tamanneftegaz" firm that was engaged in the construction of a piece in the village.

The territorial Emergencies Ministry press service confirmed the incident and said searches are being carried out with assistance from the federal rescue team.