This is a March 8, 2008 file photo of former British Prime Minister Prime Minister Gordon Brown, Elisabeth Murdoch, daughter of media magnate Rupert Murdoch, 2nd left, politician Baroness Amos, 2nd right, and chief executive of News International Rebekah Brooks during a reception for women in business at 10 Downing Street in London. The scandal engulfing Rupert Murdoch's media empire exploded in several directions Monday July 11, 2011, with fresh reports of phone hacking attacks against some of the nation's most powerful figures, including royals and former Prime Minister Gordon Brown. (AP Photo/ Fiona Hanson/PA, File) UNITED KINGDOM OUT NO SALES NO ARCHIVE

(AP) -- A legislative committee is questioning senior London police officers about why they didn't pursue a phone hacking investigation at the tabloid News of the World two years ago.

The newspaper was shut amid a flurry of public indignation over it hacked into phones, including that of a murdered 13-year-old.

Before Tuesday's hearing, opposition Labour Party legislators called for the resignation of John Yates, assistant commissioner of Metropolitan Police. He decided in 2009 that there was nothing more to investigate at the paper. Yates says he relied on advice from colleagues.

In 2007, a reporter and a private detective working for News of the World were sent to prison for hacking the voicemail messages of employees.