Twenty-five sickest patients have died in last 24 hours at Sir Ganga Ram Hospital in Delhi due to low oxygen supply, hospital's Director of Medical said.

"Oxygen will last another 2 hours. Ventilators and Bipap are not working effectively. Need Oxygen to be airlifted urgently," he said.

He further said that lives of another 60 sickest patients in peril due to oxygen crisis.