Alexis Tsipras has hailed a "victory of the people" after his left-wing Syriza party won Greece's fifth election in six years.

Mr Tsipras said his decision to call an early election was vindicated and that he had been given a clear mandate.

He told thousands of jubilant supporters in central Athens: "In Europe today, Greece and the Greek people are synonymous with resistance and dignity, and this struggle will be continued together for another four years.