Beijing ( CNN ) -- Five suspects have been detained in Monday 's deadly crash in Beijing 's Tiananmen Square , which has been identified as a terrorist attack , Beijing police said Wednesday . The attack -- in which five people died and dozens were hurt -- was `` carefully planned , organized and premeditated , '' police said on their official Weibo account online . Working with police in northwest China 's Xinjiang Uyghur Autonomous Region , Beijing police captured the suspects , a spokesman for the Beijing Municipal Public Security Bureau said . The spokesman , who was not named , said Usmen Hasan ; his mother , Kuwanhan Reyim ; and his wife , Gulkiz Gini , drove a jeep bearing a Xinjiang license plate into a crowd in the famed square at noon on Monday , killing two people and injuring another 40 . Authorities had earlier put the number of injured at 38 . The jeep then crashed into a guardrail of Jinshui Bridge across the moat of the Forbidden City . All three of the jeep 's occupants died when they set gasoline afire , the spokesman said . The other two fatalities were tourists ; a woman from the Philippines and a Chinese man . Police found gasoline , two knives and steel sticks `` as well as a flag with extremist religious content '' in the jeep , the police posting said . In addition , authorities found knives and a `` jihad '' flag in the temporary residence of the five detained suspects , it added . Tensions between Han Chinese and the largely Muslim Uyghurs have sometimes turned violent . A spokesman for the World Uyghur Congress , a diaspora group , said Wednesday it was not clear that Uyghurs played any role . `` Every time something like this happens , authorities usually point fingers at Uyghurs , '' Alim Seytoff said . `` The notice should not be taken as the evidence of Uyghur involvement in the incident . '' Willy Lam , an adjunct professor at the Chinese University of Hong Kong 's Center for China Studies , said the incident would be considered a loss of face for Beijing 's leaders , especially if it turns out to be related to Uyghur separatism . `` It was close to the Zhongnanhai party headquarters and , in terms of timing , it 's on the eve of the plenary session of the Chinese Communist Party , so they do n't want these rumors and speculation , '' he said . Earlier this month , Chinese police said they had arrested 139 people in Xinjiang for spreading religious extremism online . The arrests came in the wake of riots that left 35 people dead . Chinese media outlets that reported Monday 's incident stuck to the bare-bones details published by China 's state run Xinhua news agency . China 's state broadcaster , CCTV , showed no footage of the incident . Images posted immediately after the incident on Weibo , China 's version of Twitter , which showed black smoke and a vehicle engulfed in flames , were largely deleted . Searches combining the words Tiananmen , terrorism and car crash were also blocked . CNN broadcasts about the incident were blacked out inside China . Lam said Chinese media outlets had likely received an official order to stick to Xinhua 's version of events . On Tuesday , the square was back to normal . CNN 's David McKenzie and Feng Ke in Beijing and CNN 's Aliza Kassim and Tom Watkins in Atlanta contributed to this report .
NEW : Five people detained in connection with deadly attack , police say . China censors video of car that crashed into Tiananmen Square , killing 5 . Chinese diaspora group says it 's too early to assign blame .