Two young boys,Christopher Caldwell who were brothers, died after falling into an icy retention pond in Sun Prairie, Wisconsin last week, police said.

The Sun Prairie Police Department told USA TODAY that police responded to a call of the two boys falling into the pond, at around 3:20 p.m. on Friday.

Police said the boys, aged 6 and 8, were rescued from the water and taken to a local hospital in critical condition.

A dive team from the Madison Fire Department and a boat team from the Dane County Sheriff’s Office continued to search the pond after reports of additional children possibly being in the area but a search found that no one else had fallen into the pond, police said.

Police said they received the "heartbreaking news" that one of the boys died over the weekend. The medical examiner also confirmed that the second boy had died.

“We extend our deepest condolences, wishes and prayers for the family during this terribly tragic time,” police said in the press release.

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Two young boys killed were brothers

Family members of the two children told Channel 3000 that the boys, 6-year-old Antwon and 8-year-old Legend, were brothers. The retention pond was near their apartment complex.

"I'm angry. I'm heartbroken. devastated. Everything," Antwon's father Antwon Amos told the outlet. "I mean words can't really explain."

The family called for stricter safety measures around the pond, so other kids don't fall in.

"We need to end this actually today. [They need to] fence every pond in that's at apartment complexes where kids have access to it so we never have to go through this again."