U.K. police have arrested one of their own, a 51-year-old Scotland Yard detective investigating the phone hacking allegations at the shuttered News of the World. The officer was arrested at work on Thursday for allegedly leaking information about the ongoing investigation. He has since posted bail. A tweet from Sky News indicated the detective had leaked information to the Guardian, which has been at the forefront of the News of the World hacking story for years. Another 35-year-old man who hasn't been officially identified but is "understood by the BBC to be former News of the World reporter Dan Evans," has also been taken into custody by appointment on Friday.