A blogger and exiled critic of Chechen leader Ramzan Kadyrov was shot to death last week, according to a leading Chechen opposition group.

Tumso Abdurakhmanov, a vocal critic of Kadyrov who had been living in asylum in Sweden, stopped posting to social media last week, sparking concerns for his well-being.

“Unfortunately the rumors about his death turned out to be true,” 1ADAT, an anonymous dissident Telegram channel, posted late Sunday.

“Tumso was shot at night by a group of people and at the moment the details of the murder are being investigated.”