Four COVID-19 patients have died at the district hospital in Barwani, Madhya Pradesh, due to problems with oxygen supply, their families alleged. District authorities, while admitting a glitch on Saturday night, said only one person had died of cardiac arrest. Visuals shared with NDTV showed relatives struggling to help the patients amid the oxygen glitch. They said the flow was turned off for at least 30 minutes. (Disclaimer: Content in this video could be disturbing for viewers.)