Is there any information what have they been contaminated with? I remember last year some green-anarchists in Greece threatened to contaminate coca-cola 1l bottles, they have been removed from production in several marketplaces.

Literally needles. Like sewing needles.

I am guessing you are thinking of injection needles injecting some substance in, which would frankly be more scary because there would be no way to tell if a fruit is infected or not.

I've been cutting up strawberries and carried on buying and eating them and feeling safe enough.