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 is a parliamentary republic with a unicameral legislature of 230 members, elected by direct vote to serve four-year terms. On March 13, President Marcelo Rebelo de Sousa dissolved parliament and called a snap election for May 18, marking the country's third early parliamentary election in less than four years.