Police arrested a 22-year-old man for allegedly stabbing an 18-year-old woman, whom he was in a relationship with, in Yokohama on Thursday.

The victim was identified as Sana Tominaga, a university student who lives in Yokohama’s Tsurumi Ward. She was rushed to the hospital after the attack but doctors pronounced her dead. The boyfriend, identified as Haruki Ito, went to a nearby police station with a knife and admitted to stabbing her.

Her family called the police when they found her collapsed and covered with blood in an apartment complex at around 10 a.m., NHK reported.

According to Kanagawa Prefectural Police, Tominaga or another person called the police four times between October 2021 and June this year to report that she was in a fight with her boyfriend.

Tominaga's friend quoted her as saying that her ex-boyfriend had hit her in the face.

Information from Kyodo added