A Japanese woman died after being stabbed in the lobby of a Tokyo court building Wednesday and her American husband involved in divorce proceedings was arrested near the scene, police said.

Kyoko Wilson, 31, who was stabbed in the neck at the Tokyo Family Court building around 3:20 p.m., was taken to a hospital where she was pronounced dead, the police said.

The police withheld the name of the 32-year-old husband, while saying they will investigate whether he can be held criminally liable.

The wife told police in August that her husband was mentally unstable, the police said.

He was in possession of three foldable knives and bottles containing a liquid thought to be gasoline when he was arrested on suspicion of attempted murder shortly after he fled into nearby Hibiya Park.

He had cut his own wrists and was also taken to a hospital.

According to the police, the wife and husband were meeting at the court for divorce proceedings that day. He had been sitting on a bench in the lobby of the building, and attacked her in an ambush when he saw her arrive.

The court is in the Kasumigaseki district in central Tokyo dotted with central government offices and near entrances for subway stations on the Marunouchi and Chiyoda lines.