Picture used for illustrative purposes only.
Dave Lundquist, marine technical advisor at the Department of Conservation, in an email said a technical team on Monday had assessed the situation and euthanised the surviving whales.
"This decision is never taken lightly, but in cases like this it is the kindest option," Lundquist said. The conservation department does not try to refloat whales in the area due to the risk of shark attack to both humans and whales, he said.
Daren Grover, general manager at charity Project Jonah, which deals with stranded whales, said there were also not enough people in the area to help with refloating.
The Pitt Island and Chatham Island make up the Chatham Islands archipelago which lies about 840 kilometres (521.95 miles) off the east coast of New Zealand's South Island. Around 800 people live on the larger Chatham Island, with 40 people living on Pitt Island.
Grover said given the position of the archipelago near where subtropical and sub-Antarctic oceans meet there was an abundance of sea life in the area which attracted the likes of whales.
The Chatham Island stranding occurred on Saturday, and also involved surviving pilot whales being euthanised.
Nearby New Zealand and neighbouring Australia are hot spots for mass whale strandings owing to large colonies of pilot whales living in the deep oceans surrounding both island nations. The cause of whale stranding is unknown.
Volunteers first managed to refloat the whales on Monday evening’s high tide. But sometime overnight, the whales beached themselves again. So the volunteers refloated them again on Tuesday.
The Department of Conservation (DOC) said the pod of 49 long-finned pilot whales was found early on Monday at Farewell Spit, about 90 kilometres north of the South Island tourist town of Nelson.
New Zealand's Department of Conservation (DOC) said in total 97 pilot whales and three dolphins died in the stranding, adding that they were notified of the incident on Sunday.
The blast took place at the mosque where a large number of people had gathered for prayer, police official Sikandar Khan said. "A portion of the building had collapsed and several people are believed to be under it," Khan added.
“The deliberate shelling of active civilian medical facilities and the targeted killing of civilians are grave war crimes of the Kyiv regime and its Western masters,” the Russian foreign ministry said.
In Cairo, Blinken is meeting Sisi and Foreign Minister Sameh Shoukry, and is expected to address regional issues including attempts to relaunch a political transition in Sudan and the deadlock between rival factions in Libya.