OSLO, Norway (AP) – Church bells rang out across Norway on Thursday, marking 10 years since the country’s worst ever peacetime slaughter as commemoration ceremonies took place throughout the day.

On July 22, 2011, extremist Anders Breivik set off a bomb in the capital, Oslo, killing eight people, before heading to tiny Utoya island where he stalked and shot dead 69 mostly teen members of the Labor Party’s youth wing.

Events were held around the country, including a service in Oslo Cathedral that ended with the first peal of bells. Thousands of people gathered in the streets outside to mourn the 77 victims.

Arriving on crutches, 84-year-old King Harald took his seat for the service beside Queen Sonja at the front of Oslo Cathedral as the country observed a minute’s silence.

Speaking in front of 77 roses arranged into the shape of a heart, Jens Stoltenberg, Norway’s prime minister at the time of the attacks in 2011, told the congregation that “10 years ago we met hatred with love, but the hatred is still there.”

Mr. Stoltenberg, currently NATO Secretary General, said Breivik was “one of us.”

“The perpetrator was a right-wing extremist. He misused Christian symbols. He grew up in our streets, belonged to the same religion and had the same skin color as the majority in this country. He was one of us,” Mr. Stoltenberg said.

“But he is not one of us, who respects democracy. He is one of those who believe they have the right to kill for their political objectives.”

Around the country, people listened as emotional survivors read aloud the names of the 77 victims at a televised memorial event.

Some parents of the victims reflected on the way the country coped with the slaughter, and said that “time does not heal all wounds.”

“[The victims] would be proud of how we reacted after the terror and how the rule of law stood strong,” said Lisbeth Kristine Roeyneland, whose daughter Synne was murdered by Breivik.

“What would those who were so brutally and unfairly killed think of us now 10 years later? I think they would be sad to know that there still are survivors and bereaved with great needs,” Ms. Roeyneland said.

Prime Minister Erna Solberg said it hurt to think back “on that dark July day” and added: “We must not leave hate unchallenged.”

“The terror attack on the 22nd of July was an attack on our democracy,” Ms. Solberg, Norway’s prime minister since 2013, said. “It was a politically motivated terrorist act towards the Labor Party, AUF and their ideas. But it wasn’t just an attack on a political movement. A whole nation was struck. But we rose again. But Norway was changed by an experience which still causes pain.”

King Harald was expected to speak during a commemoration in Oslo later Thursday. He was to be joined by past and present prime ministers and leaders of the Labor Party youth wing. Events will also take place on Utoya.