article_snippet.sent: London (CNN)British police investigating a spectacular heist in the heart of London's jewelry district said Friday they knew a burglar alarm went off but didn't respond.
article_snippet.sent: Southern Monitoring Alarm Company called the Metropolitan Police Service, also known as Scotland Yard, at 12:21 a.m. April 3 to report that a burglar alarm had been activated at Hatton Garden Safe Deposit Ltd., MPS said in a prepared statement.
highlights_snippet.sent: British police say British police didn't respond to a burglar alarm in jewelry district .
  