(CNN) -- Police have arrested three more suspects in Saturday's knife attack that killed dozens of people at a train station in the southwestern Chinese city of Kunming, China's state-run Xinhua news agency reported Monday, citing the Ministry of Public Security.
Authorities now believe all eight alleged attackers have been arrested or killed, Xinhua reported. Four are under arrest, and four were fatally shot by police at the scene Saturday, according to the news agency.
Attackers with long knives stormed the station, killing at least 28 people and wounding 113, according to Xinhua. Members of a separatist group from Xinjiang, in northwest China, are believed to have carried out the assault, authorities said. Xinhua's reports referred to them as terrorists.