Portugal's governing right-of-centre Democratic Alliance has won snap parliamentary elections - the third in as many years - again falling short of a majority. Its leader Luís Montenegro promised supporters to "stimulate investment" and to "guarantee prosperity and social justice".

Portugal's centre-right Democratic Alliance (AD) won an early parliamentary election on Sunday, but again fell short of the full majority needed to end a long period of political uncertainty, while the centre-left Socialists and far-right Chega were nearly tied for second place.

Portugal’s ruling center-right coalition won a snap election Sunday in a vote that saw the far-right and the Socialists compete neck-and-neck for second place, rocking the two-party system that’s dominated the country’s political life for 50 years.