'It's very difficult,' says Sipekne'katik chief after discovery of 751 unmarked graves in Sask.

WARNING: This story contains distressing details.

AFirst Nations chief expressed hope Friday that no remains will be found at the site of a former residential school in Shubenacadie, N.S., after what he described as the "heartbreaking" discovery of 751 unmarked graves in Saskatchewan the second such finding in four weeks.

Cowessess First Nation in Saskatchewan has said it's unclear if all theunmarked graves near the former Marieval Indian Residential Schoolbelong to children, and search efforts will continue in the area based off oral history.

"It's very difficult. I couldn't imagine what the trauma is bringing back up in the community and the surrounding areas," Chief Mike Sack of the Sipekne'katik First Nation in Nova Scotiatold CBC Radio's Information Morning Halifax.

Thediscovery in Saskatchewan comes less than a month after the remains of 215 children were detected at the former Kamloops Indian Residential School in British Columbia, which spurred calls for searches at every former residential school site.

A search is underway at the former site of theShubenacadie Indian Residential School, about 45 minutes northeast of Halifax,which operated between 1929 and 1967. As of Friday, nothing hadbeen detected.

Sack saidin a statement that about 10 hectaresof land havealready been surveyed, but there are two large swaths of land that run down to the river where buildings once stoodthat still need to be searched.

He expects the search will be completed by the end of next week.

"There's a lot of stories out there and I hear every day that there are going to be some graves found," he said. "But as of right now, there's nothing.So I'm happy [about] that."

Education is key

Michael R. Denny, an educator at Mi'kmaw Kina'matnewey in Cape Breton, said the recent discoveries may be retraumatizingforresidential school survivors and their families, but it's important for all Canadians to learn the history.

"The Shubenacadie Indian Residential School closed on June 22, 1967 that wasn't too long ago," Denny, who is also a former support worker for residential school survivors, told Information Morning on Thursday.

"So if we took the time to learn about those little things like that, maybe we'll be better off as Canadians."

Dennysaid better education would allow First Nations and Canadians to work together to implement the Truth and Reconciliation Commission's calls to action, which aimto redress the effects of residential schools.

They are effectsthat are still being felt within Indigenous communities across Canada, said Sack.

"We just want the best for the people," he said."I just want it to go away and I don't want our people to have this shadow over us going forward."

He said he'shopeful the discovery of theunmarked graveswill allow communities to move forward.

"It's just a horrible time, but I'm glad that it's coming out and it's being acknowledged," he said.

"Hopefully we can give these children a proper send-off and set their spirits free."

Supportis available for anyone affected by their experience at residential schools, and those who are triggered by these reports.

A national Indian Residential School Crisis Line has been set up to providesupportfor residential school survivorsand others affected. People can access emotional and crisis referral services by calling the 24-hour national crisis line: 1-866-925-4419.