French police probe multiple cuts of major Internet cables
apnews.com
apnews.com
If the latter, then it's someone going round the city grabbing all the valuable copper.
And tomorrow they'll show up at a junkyard in Austria and leave disappointed because fiber isn't made of copper, but to the not-so-smart thief, that isn't obvious.
And at current prices, you'd need a ton of copper to justify a drive from France to Austria :-)
You forgot Iran, the foreigners, China, Palau, coloured people. Everyone can be a terrorist. Just be alert /s