From the US's other newspaper of record, the UK Daily Mail:
Two teenage brothers have been arrested after allegedly stabbing to death their parents, two brothers and a sister at their home on Wednesday night in what is being described as the 'worst criminal event' in the Oklahoma town's history.
Police went to the address in Broken Arrow, a town southeast of Tulsa, Oklahoma, after receiving an 'open 911 call' - where someone calls the emergency number but does not speak.
When officers arrived, they found five bodies - two parents, two sons and a daughter - as well as a seriously injured 13-year-old girl and an unharmed two-year-old girl.
While police have yet to identify the victims, they say the daughter who was killed was approximately 5-years-old while the two boys were about 7 and 12.