* India has world's highest infection tally for second day
* Some of Delhi's hospitals shut doors to new patients
* Delhi government says army should handle oxygen deliveries
People scrambled for life-saving oxygen supplies across India on Friday and patients lay dying outside hospitals as the capital recorded the equivalent of one death from Covid-19 every five minutes.
For the second day running, the country's overnight infection total was higher than ever recorded anywhere in the world since the pandemic began last year, at 332,730.
India's second wave has hit with such ferocity that hospitals are running out of oxygen, beds and anti-viral drugs. Many patients have been turned away because there was no space for them, doctors in Delhi said.
Ambulance sirens sounded throughout the day in the deserted streets of the capital, one of India's worst hit cities, where a lockdown is in place to try and stem the transmission of the virus.
Mass cremations have been taking place as the crematoriums have run out of space and families have had to wait for two days to cremate the dead.
At Guru Teg Bahadur Hospital in the north east of the city, critical patients gasping for air arrived in ambulances and autorickshaws. One man among half a dozen people waiting for hours on trolleys outside on Friday died before being admitted.
"The staff are doing their best but there is not enough oxygen," Tushar Maurya, whose mother is being treated at the hospital, told Reuters. "If you are not in a serious condition please don't come. It isn't safe."
The India Today television channel showed angry relatives outside a hospital in Ahmedabad, the largest city in Prime Minister Narendra Modi's home state of Gujarat.
"People are dying in front of hospitals while they wait for a bed to become available," one man said.
Another young man, who was not identified, said "Is this why we voted for this government? When we need it the most, we find ourselves all alone. Where will the poor go?"
Health experts say India became complacent in the winter, when new cases were running at about 10,000 a day and seemed to be under control, and lifted restrictions to allow big gatherings.
Modi himself has faced rare criticism for allowing political rallies and a Hindu religious festival, in which millions take a ritual bath in the Ganges river, to go ahead. He addressed many of the rallies with packed crowds and few people wearing masks.
"Indians let down their collective guard," Zarir Udwadia, a pulmonologist on Maharashtra's task force, wrote in the Times of India newspaper.
"We heard self-congratulatory declarations of victory from our leaders, now cruelly exposed as mere self-assured hubris."
Delhi's government declared in February it had beaten back the coronavirus. On Friday, Chief Minister Arvind Kejriwal went on live television to plead for medical oxygen supplies in a virtual meeting with Modi, warning that many people would die.
"All of the country's oxygen plants should immediately be taken over by the government through the army," he said.
Police in the northern state of Uttar Pradesh, some wielding assault rifles, escorted trucks to waiting hospitals in Delhi, while city governments traded accusations over hoarding.
Modi said government was making a "continuous effort" to increase oxygen supplies, including steps to divert industrial oxygen.
A fire broke out in a hospital treating Covid-19 patients in a Mumbai suburb early on Friday, killing 13 people, underlining the stress the hospitals were under. On Wednesday, 22 patients died at a public hospital in Maharashtra where Mumbai is located when oxygen supply ran out due to a leaking tank.
World Health Organization chief Tedros Adhanom Ghebreyesus said he was concerned about the growing case load in India, which on Thursday passed the previous global high of 297,430 recorded in January in the United States, where case numbers have fallen.
"The situation in India is a devastating reminder of what the virus can do," he told a virtual briefing in Geneva.
WHO emergencies director Mike Ryan said reducing transmission would be a "very difficult task" but the government was working on limiting mixing between people, which he said was essential.
Bhramar Mukherjee, a professor of biostatistics and epidemiology at the University of Michigan in the United States, said it seemed as if there was no social safety net for Indians.
"Everyone is fighting for their own survival and trying to protect their loved ones," he said. "This is hard to watch."
A mass cremation of victims who died due to the coronavirus disease (Covid-19), is seen at a crematorium ground in New Delhi