An 18-year-old woman was found stabbed to death at a Nagoya train station late Saturday, soon after a 29-year-old man died after being hit by a train at the same station, police said Monday, prompting investigators to look into a possible connection between the two cases.

Tsukine Kawamura, who lived in Nagoya, was found lying with a knife in her chest in the platform waiting room at Moto-Kasadera Station on the Meitetsu Nagoya Line at around 8 p.m. on Saturday. She was rushed to the hospital, where she was confirmed dead 2½ hours later.

Around the same time, station officials called the police to report that a man, later identified as Takuya Minami, also a Nagoya resident, had jumped in front of a passing express train from the same platform.

The police said that they are investigating Kawamura’s case as a homicide, while they are still unsure about Minami’s case.

Before she died, Kawamura was able to use her smartphone to make an emergency call to the police, they said.

At the time of the incident, a local train was stationary at the platform and there were no passengers other than Kawamura and Minami near the waiting room, the police said.

A few days earlier, Kawamura wrote on social media that she had broken up with her boyfriend and complained that he would not allow her to see her friends.

According to TBS, an anonymous friend of Kawamura said that she and Minami were in a relationship and the boyfriend was prone to violence. NHK, meanwhile, reported that Kawamura was a shy and quiet child when she was in grade school, quoting a friend from elementary school. Another friend from junior high school commented that she was not the type to cause trouble.

Information from Kyodo added