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Japanese police arrested an American man on Wednesday on suspicion of fatally stabbing his Japanese wife at a court where they were to settle a divorce, officials and media reports said.

The man, identified only as a 32-year-old U.S. citizen, stabbed the woman in the neck near a security check at the entrance to Tokyo Family Court, police said. The suspect's name was not released due to concern about his mental condition and his motive was not known, police said.

The victim, identified as Kyoko Wilson, 31, was taken to a hospital but later died, police said.

Television video showed police and court guards scrambling to cover the crime scene with a blue tarp. An aerial view showed the man after he had apparently fled being caught in a nearby park, where he was seen lying on the ground surrounded by police.

The suspect had three knives and police believe he ambushed the woman when she walked into the building, NHK public television reported.