LONDON (AP) — Prime Minister David Cameron’s former communications chief and an ex-royal reporter were arrested Friday in a phone hacking and police corruption scandal that has already toppled a major tabloid and rattled the cozy relationship between British politicians and the powerful Murdoch media empire.

The 168-year-old muckraking tabloid News of the World was shut down Thursday after being engulfed by allegations its journalists paid police for information and hacked into the phone messages of celebrities, young murder victims and even the grieving families of dead soldiers. Its last publication day is Sunday.