Sri Lanka has saved some 120 pilot whales in a gruelling overnight rescue involving the navy, officials said Tuesday, after the island nation's biggest stranding.

Three pilot whales and one dolphin died of injuries following the mass beaching on Monday on the country's western coast at Panadura some 25 kilometres (15 miles) south of the capital Colombo.

A handful of whales had started beaching in the early afternoon and their numbers swelled to more than 100 by dusk, overwhelming local volunteers, resident Pathum Hirushan told AFP.

"Some of the fishermen from the area tried to push back the whales. The sea was rough and the waves would bring them back to shore," Hirushan said.

"It was very tiring, but later the navy came in with their boats and worked through the night."

The navy and the coastguard, as well as dozen of volunteers, were able to move the other mammals into deeper waters with the aid of small patrol craft by dawn on Tuesday, navy spokesman Indika de Silva told AFP.

Volunteers had come forward to help with the rescue despite the region being under a days-long lockdown to combat the spread of the coronavirus pandemic.

Pilot whales -- which can grow up to six metres (20 feet) long and weigh a tonne -- are highly social.

The causes of mass strandings remain unknown despite scientists studying the phenomenon for decades.

The wildlife department's chief veterinarian Tharaka Prasad told AFP autopsies were carried out on the dead whales and officials were "satisfied they were disoriented".

He hailed the rescue as one of the most successful in the world.

Authorities had braced for mass deaths, after some 360 out of 470 pilot whales that beached in a remote harbour in Australia's southern island state of Tasmania in September were not able to be saved.

Sri Lanka's Marine Environment Protection Authority had said Monday that the Panadura stranding was the South Asian country's largest.

The last mass beaching in Sri Lanka was in June 2017 when 20 pilot whales were stranded at a beach in the coastal town of Sampur near Trincomalee harbour in the country's northeast. All were saved.

A sperm whale was stranded inside Trincomalee harbour in April 2011 and two navy boats guided it out into deeper waters where it was reunited with waiting whales.

The waters around Trincomalee, used by Allied forces as a staging post during World War II, have a high concentration of blue and sperm whales.

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Whale stranding in New Zealand sparks rescue mission
Wellington (AFP) Oct 17, 2020
Conservationists on Saturday were working to save a large pod of whales stranded in shallow water off New Zealand's Coromandel Peninsula. "Around 40 whales were sighted and sadly 25 have stranded," a spokesman for the conservation group Project Jonah said. Project Jonah general manager Darren Grover told reporters they were trying to keep the whales cool and healthy and would try to refloat them on the evening high tide. Pilot whales, which can grow to more than six metres (20 feet) long, ar ... read more