Japanese media on Tuesday reported that the younger sister of North Korea’s leader may have worked with the daughter of a high-profile Japanese abduction victim.

Kim Yo Jong, Kim Jong Un’s younger sister and Kim Eun Gyong, daughter of Megumi Yokota, abducted by North Korea in 1977, may have worked together at a key government institution in Pyongyang last year after graduating from the same university.

The Yomiuri Shimbun and the Mainichi Shimbun, among other media, said Kim Yo Jong and Kim Eun Gyong, both aged 26, graduated from Kim Il Sung University and both majored in computer science.