The men struck at the Premier store on Bramley Park Road, Handsworth, at 7.20pm on Tuesday.
CRIME: Thieves target cricket club in SheffieldSouth Yorkshire Police said the men threatened a member of staff with a large knife before demanding money and stealing cash from the till.
Remembering 'beautiful' and 'amazing' Blake and Tristan Barrass three years on from tragic Sheffield brothers' funeral
Sheffield Council employees sacked as fraud increases including theft and excessive internet use during work
EuroMillions: Mystery winner from South Yorkshire has won £79,242.50 on The National Lottery
Sheffield Council tenant forced to pay £5,000 and struck from housing register for fraud
Sheffield Crown Court: Paedophile hunter group members posed online as young girls to trap pervert