The man, aged in his 20s, was taken to hospital where he remains. His condition is described as critical.
At 4.23pm on April 21 Craig Mellor entered the Spar Shop in Leeds Roads, Nelson, wearing a balaclava and brandishing a large knife. We recovered CCTV footage which showed 42-year-old Mellor threaten a male member of staff with the knife to get a quantity of cash from the till.
Can you help us to identify the men in these images?
We want to speak to them in connection with an attempted robbery at Aldi on Active way in Burnley.