Humanitarian groups have hailed the decision as "historic," as it will determine a complete blockade on weapons sales to the Gulf countries.
Italian Prime Minister Giuseppe Conte will hand in his resignation to the head of state after convening the cabinet to inform ministers of his decision.
Former PM Matteo Renzi takes back his support from the ruling coalition, paving way for political crisis amid the resurgent Covid-19 pandemic.
Former prime minister Silvio Berlusconi is unwanted, but the largest grouping in Italy's parliament needs his party's support to be part of a majority coalition.
Italy's rival political parties made a final bid for votes on Friday ahead of an election in which former prime minister Silvio Berlusconi is gunning for a leading role in shaping any new government.
Sunday’s result could leave Italians without a clear winner, complicating the country’s already uncertain political future.
A parliamentary election set for March 4 may bring a new era of uncertainty to the country as it is expected to produce a hung parliament.
Both a centre-right coalition backed by former Italian premier Silvio Berlusconi and the populist 5-Star Movement claimed momentum going into a national election next year following the results of Sicily's regional vote.
Exit polls have shown the Sicily election will be a key indicator for Italy's general election. The vote is a neck-and-neck race between the centre-right and the populists.
Exit polls will be issued when voting ends at 10 pm (2100 GMT), but the actual vote count will not begin until Monday at 8 am.
Poll says idea of "ius soli" or rights linked to the land where you are born is losing support among Italians, a drop from 41 percent in October last year to 32.3 percent now, even though such a path to citizenship exists in many other EU countries
Paolo Gentiloni, who served as foreign minister under Matteo Renzi, has been asked by President Sergio Mattarella to form a new government.
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