Detained Binance executive Tigran Gambaryan's family calls for release, says he is 'mostly bedridden' as health worsens.

Tigran Gambaryan has a herniated disc in his back and needs surgery, according to a statement released on Monday by a communications firm representing his family.

Gambaryan, a U.S. citizen who oversees financial crime compliance at Binance, has been held in Nigeria since February.