Portugal's ruling centre-right Democratic Alliance (AD) won a snap parliamentary election on Sunday but again fell short of the majority needed to end a long period of instability as the far-right Chega gained a record share of the vote.

Voters are returning to the polls for a third general election in three years, as the country’s increasingly fragmented political landscape defies efforts to unite behind policies on pressing national...

Hopes that the ballot might end the worst spell of political instability in decades for the European Union country of 10.6 million people could be dashed, however.