FRENCH police have thwarted an imminent “terror attack” and arrested two suspected radicals in the southern port city of Marseille, authorities said.

Paris prosecutor Francois Molins said at a news conference that the two suspects “were getting ready to carry out an imminent, violent action on national territory”.

He said at this stage investigators have not determined “the day, the targets and the exact circumstances” of a potential attack.

France votes on Sunday in the first round of its two-stage election.

Extra safety measures are being put in place for the balloting after extremist attacks in the country that have made security one of the major issues of the presidential campaign.

Mahiedine Merabet, 29, and Clement Baur, 23, both French, were detained under arrest warrants for terrorist criminal association, according to a police document obtained by the Associated Press.

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