National Crime Agency which was set up six moths ago has made its first arrests. They have arrested 660 peadophiles from all parts of Briton.
Only 39 of those arrested were registered sex offenders known to the authorities.
45 police forces were involved in the early morning raids in England, Wales, Scotland and Northern Ireland searching more than 800 properties.
When the police start searching the computers, we might see lots more arrests and maybe many more around the world.