A Channel Seven reporter and her cameraman have been mugged by gun-wielding thieves – with the attack beamed live to Seven's Sydney control room.

Seemingly unaware the camera they stole was still recording, the dim-witted thugs took off on pushbikes with the $25,000 device.

Back in Seven's Sydney headquarters, shocked producers watched the robbery as it unfolded in the inner-north London suburb of Islington.

They immediately handed the incriminating footage to police, who are now investigating.

The incident began with a live cross to Sunrise by journalist Laurel Irving. After she finished on-air about 10pm on Monday (Tuesday morning in Australia), she continued recording material for a future broadcast. She and cameraman Jimmy Cannon were then approached by two men.