In the current proposed randomized controlled trial, the investigators compare OTSC and standard therapies (hemo-clipping or thermal coagulation) as the primary endoscopic treatment in the control of bleeding from non-variceal causes in patients who present with acute upper gastrointestinal bleeding. The investigators argue that OTSC should be used as the first treatment given its promise in better bleeding control over other treatment methods. Rebleeding patients are exposed to excessive risks in organ failure and death. Furthermore, management of recurrent bleeding is expensive e.g. cost of angiographic embolization, surgery and intensive care stay.