Bike thieves escape

Three men armed with hand guns are being hunted by police after robbing a Northants supermarket and getting away on a bike. 
Two of the balaclava wearing men took cash from the tills in Tesco Express, Corby two days ago (Tuesday 21 November) and jumped onto a bike held by a waiting getaway rider.    No description of the men or bike is available. 
Call 08453 700700 with any information.