A referendum in Italy on easing citizenship rules and enhancing workers' rights has been declared invalid.

Around 30% of voters participated - well short of the 50% threshold required to make the vote binding - in the poll, which began on Sunday and ran until 15:00 (14:00 BST) on Monday.

The ballot featured five questions covering different issues, including a proposal to halve the length of time an individual has to live in Italy before they can apply for citizenship from 10 to five years.

The referendum was initiated by a citizens' initiative and supported by civil society groups and trade unions, all of whom campaigned for the Yes vote.

For them, the outcome - which saw turnout levels as low as 22% in regions like Sicily and Calabria - will come as a blow.