Police in Toyohashi, Aichi Prefecture, said Friday they have arrested a 22-year-old woman on suspicion of killing her nine-day-old son.

According to police, Keiko Shinohara called 119 at around 9:20 a.m. Thursday and said she had strangled her baby boy at their apartment, Sankei Shimbun reported. The baby was rushed to hospital where he died about 90 minutes later.

Police said Shinohara told them she strangled her baby at around 8 a.m. because he wouldn't stop crying and she became irritated.

Shinohara’s husband had left for work at the time of the incident.

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