Oklahoma police responding to a silent 911 call found five people stabbed to death inside a suburban Tulsa home, then arrested two teens suspected of the murders after a police dog tracked them to nearby woods.

Authorities went to check out the residence after receiving a 911 hang-up call at 11:30 p.m.. Upon arrival, police found a scene so disturbing that it could take all of Thursday to process the evidence, Broken Arrow Police Sgt. Thomas Cooper said, according to FOX News.

"It certainly is shocking. I'm shocked," said Patricia Statham, a neighbor. "I feel so bad for everyone who walks into that house. You can see it in the faces of the officers when they come out."

Nine people in total were linked to the family home: the five dead, which includes adults and juveniles, the two teenagers – 16 and 18 – a girl in critical condition with stab wounds and another child who was unharmed. The child who wasn't wounded has been transferred to state custody, according to Newser.

Police are referring to this quintuple murder  as "unprecedented" for a neighborhood that is renowned for it's safety.

"It was a pretty gruesome scene and unprecedented in terms of the types of crimes we get in Broken Arrow," Cooper told NBC News.

Cooper said Broken Arrow police asked the Oklahoma State Bureau of Investigation for assistance on the case.

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