Trinity Mirror reviews editorial controls

LONDON, July 26 (UPI) -- British newspaper chain Trinity Mirror says it's reviewing editorial controls to determine whether phone hacking extended beyond the News of the World.

The move came as Trinity's stock price tumbled 9.8 percent Monday and continued falling Tuesday as investors worried the hacking was more widespread, The Guardian reported.

The six-week review, headed by Paul Vickers, Trinity's legal director, will focus on all the chain's national and regional newspapers, including the Daily Mirror, Sunday Mirror and the Daily Record.

Former Daily Mirror reporter James Hipwell continued to assert that hacking was widespread at other newspapers, including the Mirror, and the BBC reported alleged phone hacking and use of private detectives at the Sunday Mirror.

Trinity labeled both claims "unsubstantiated" and said its journalists abide by the criminal law and Press Complaints Commission code of conduct.

The company is conducting a "review rather than an investigation" into editorial controls and procedures but not in response to specific phone-hacking claims, The Guardian said, citing sources.

Investigators have focused on journalists allegedly hacking into the voice mail of celebrities and politicians.

The rival newspaper group the Daily Mail & General Trust said Tuesday it plans no review into phone hacking.