oxygen in city-based hospitals, the Delhi government requested the Railways to operate Oxygen Express to help them come out of the crisis, news agency PTI reported.The Indian Railways is running Oxygen Express trains and will continue to run them over the next few days to transport liquid medical oxygen and oxygen cylinders amid the acute shortage of medical oxygen as the Centre and state are struggling to combat the second wave of the COVID-19.On Friday, the Railway Board Chairman Suneet Arora confirmed, after Uttar Pradesh and Madhya Pradesh, requests for Oxygen Express has come from Andhra Pradesh and the Delhi government.Arora said, "We have received a request from Delhi just now, and we are still planning its movement.