FIB strikes again
The FIB has a long history of lying about this. They claimed at once stage they had over 8,000 locked phones that were preventing crimes from being solves. The actual number turned out to be about 10% of that - none of it terrorist related, almost entirely down to the "highly sucessful" war on drugs.
It's pretty safe to run on the assumption that when the head of the FIB says something, it's a lie.