Jewellery worth more than $1 million (£650,000) has reportedly been stolen from a hotel in Cannes - where the annual film festival is currently taking place.
The jewels were set to be loaned to celebrities who are in the French Riviera town, according to reports.
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Police have been granted extra time to question a man who is being held on suspicion of planning a terror attack.
The man opened fire at the house, shattering the front door and window.
Richard Broughton, 37, suffered fatal injuries after an "altercation where it is reported he was struck by a car", say police.