BEIJING (AP) — Chinese state media issued details Friday on 81 people sentenced on terror-related charges — nine of them to death — saying the bulk had belonged to terrorist organizations and committed murder and other violent crimes.

The sentences issued Thursday came amid a massive crackdown in the western region of Xinjiang following four high-profile attacks on civilians since late October that have handed a major security challenge to President Xi Jinping during his first 15 months in office.