LONDON - One of the detectives investigating phone hacking at the News of the World tabloid has been arrested on suspicion of leaking information about the investigation, police said Friday.

A 51-year-old detective constable was arrested at work Thursday on suspicion of "unauthorized disclosure of information," London police said. The officer has also been suspended.

Police also announced that a 35-year-old was arrested earlier in the day on suspicion of intercepting voicemails. The suspect appeared at a London police station by appointment and has been released on bail, police added.

The suspect, who was not named by police, is the 14th person arrested by officers investigating alleged phone hacking and police bribery by staff of the Rupert Murdoch-owned newspaper.

About 45 police officers are investigating claims the now-defunct newspaper eavesdropped on the mobile phone voicemail messages of celebrities, royals, politicians and crime victims.

Deputy Assistant Commissioner Sue Akers, in charge of the investigation into phone hacking and police bribery, said she had made the need for operational and informational security "very clear" when she started the inquiry.

"It is hugely disappointing that this may not have been adhered to," she said.