Dramatic moment when passers-by tackled suspected armed UBS bank robbers in Switzerland Two men had allegedly attacked bank staff at UBS in Basel, Switzerland They 'burst into bank with one keeping watch while other demanded cash' Men allegedly ran away without money after cashier couldn't open drawer Witness shouted for help and other people outside started to chase them This is the dramatic moment when passers-by decided to tackle a suspected armed bank robber. The pedestrians tried to take down two men who had allegedly attacked staff when they attempted to rob a UBS bank in Basel city centre in Switzerland - and managed to take down one of them. The suspected robbers - one wearing a mask and the other with sunglasses and a woolly hat - had allegedly burst into the bank with one keeping watch while the other demanded cash from staff. Down: The pedestrians tackled the two men who had allegedly attacked bank staff when they attempted to rob a UBS bank in Basel city centre in Switzerland 'Robbery': The two men - one wearing a mask and the other with sunglasses and a woolly hat - had allegedly burst into the bank with one keeping watch while the other demanded cash from staff But the terrified woman cashier was said to have been unable to open the drawer where the money was kept and then beaten by one of the men, before they then lost their nerve and decided to flee. A witness to the attack then called for help by shouting, and others on the street outside started to chase after the two men. The local passers-by pushed the man to the floor, where he was held until police officers arrived. Praise: Peter Gill, the prosecutor investigating the case, said the passers-by displayed 'courageous behaviour' Peter Gill, the prosecutor investigating the case, said: "It was very courageous behaviour. It was very courageous behaviour Peter Gill, prosecutor They have asked to be kept out of the spotlight so we have not named them. But they realised the robbers were not armed, and that was why they decided to tackle them. The second suspect is still on the run but police said they believe they will soon catch him.