Chinese police shot dead another Tibetan protester in the restive Sichuan province, rights groups said Friday, bringing to at least three the number killed in deadly clashes this week. Urgen, a 20-year-old Tibetan, died Thursday in Sichuan’s Rangtang county when police fired into a crowd trying to stop them from detaining another man, the US-based International Campaign for Tibet (ICT) and India-based TCHRD said. It was the third reported deadly clash this week in western Sichuan — which has big populations of ethnic Tibetans, many of whom complain of repression — in the worst unrest in Tibetan-inhabited regions in years. Security forces also fired into two separate crowds of protesters in Luhuo and Seda towns on Monday and Tuesday — also in Sichuan, a province in China’s southwest that borders Tibet — killing at least two.