GENEVA, April 26 (AFP) - The World Health Organization chief voiced alarm on Monday (Apr 26) at India's record-breaking wave of COVID-19 cases and deaths, saying the organisation was rushing to help address the crisis.

"The situation in India is beyond heartbreaking," Tedros Adhanom Ghebreyesus told reporters.

He spoke as India battles a catastrophic coronavirus wave that has overwhelmed hospitals, with crematoriums working at full capacity.

A surge in recent days has seen patients' families taking to social media to beg for oxygen supplies and locations of available hospital beds, and has forced the capital New Delhi to extend a week-long lockdown.

"WHO is doing everything we can, providing critical equipment and supplies," Tedros said.

He said the UN health agency was among other things sending "thousands of oxygen concentrators, prefabricated mobile field hospitals and laboratory supplies".

The WHO also said it had transferred more than 2,600 of its experts from various programmes, including polio and tuberculosis, to work with Indian health authorities to help respond to the pandemic.

The country of 1.3 billion has become the latest hotspot of a pandemic that has killed more than 3 million people worldwide, even as richer countries take steps towards normality with accelerating vaccination programmes.

The US and Britain rushed ventilators and vaccine materials to help India weather the crisis, while a range of other countries also pledged support.