PARIS — The dragnet tightened around the Louvre thieves on Thursday. Five more people were seized in the crown-jewels heist — including a suspect tied by DNA — the Paris prosecutor said, widening the sweep across the capital and its suburbs.

Authorities said three of the four alleged members of the “commando” team, as French media have dubbed the robbers, are now in custody.

The late-night operations in Paris and nearby Seine-Saint-Denis lift the total arrested to seven . Prosecutor Laure Beccuau told RTL that one detainee is suspected of belonging to the brazen quartet that burst into the Apollo Gallery in broad daylight on Oct. 19; others held “may be able to inform us about how the events unfolded.”

Beccuau called the response an “exceptional mobilization” — about 100 investiga

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