Some 19 people were killed and about 20 others were injured in a stabbing attack at a disabled living facility near Tokyo, according to the Sagamihara City Fire Department.
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An employee of the facility told police a man carrying a knife broke into the building, Japan's broadcasting company NHK reported.
A man later turned himself into police and told authorities he was a former employee of the center, NHK reported.
The facility is located in Sagamihara, about 35 miles outside Tokyo.
This story is developing. Check back for more updates.