A glitch in the automatic train protection and signalling system of a train on the Yellow Line caused a brief delay in Metro services on Friday morning. According to the Delhi Metro Rail Corporation (DMRC), the faulty train, which was headed towards Huda City Centre, was removed from the line at the New Delhi Metro station within half an hour. “The problem was noted around 9 am when the train was leaving Civil Lines Metro station. As a safety procedure, the train was restricted to move a speed of 25 kmph only. This led to a bunching up of trains,” Anuj Dayal, chief spokesperson of DMRC, said.