Hokkaido police arrested two women Wednesday on suspicion of killing a 17-year-old high school girl whose body was found in May.

Riko Uchida, 21, and a 19-year-old woman, both from the city of Asahikawa, Hokkaido, are suspected of pushing Runa Murayama, a high school student from the city of Rumoi, off a suspension bridge into a river in Asahikawa on April 19, resulting in her death.

Police said that after Murayama’s family reported her disappearance, police conducted searches and found her body in the downstream of the Ishikari River in late May.

According to investigators, the incident stemmed from a dispute related to social media.

The two women had already been arrested for confining the student in a car.

Translated by The Japan Times