Story highlights Three defendants deny conspiracy to commit burglary and will face trial in November

Four -- John Collins, Daniel Jones, Terence Perkins and Brian Reader -- plead guilty

Gems, cash were stolen from a safe deposit firm in London's Hatton Garden area in April

London (CNN) Four men pleaded guilty Friday, admitting their role in a spectacular heist in the heart of London's jewelry district.

Quantities of gems and cash were stolen from a safe deposit company in Hatton Garden over the four-day Easter holiday.

John Collins, 74, Daniel Jones, 58, Terence Perkins, 67, and Brian Reader, 76, each pleaded guilty to conspiracy to commit burglary during a hearing Friday at Woolwich Crown Court.

Three more defendants -- Hugh Doyle, William Lincoln and Jon Harbinson -- denied conspiracy to commit burglary and will face trial starting November 16.

They also face a charge of conspiracy to convert or transfer criminal property between April 1 and May 19.

Read More