Passage: Following the police camp incidents, the Myanmar military began a major crackdown in the villages of northern Rakhine state. In the initial operation, dozens of people were killed and many were arrested. As the crackdown continued, the casualties increased. Arbitrary arrest, extrajudicial killings, gang rapes, brutalities against civilians, and looting were carried out. According to media reports, hundreds of Rohingya people had been killed by December 2016, and many had fled Myanmar as refugees to take shelter in the nearby areas of Bangladesh.In late November, Human Rights Watch released satellite images which showed that about 1,250  Rohingya houses in five villages had been burned down by the security forces. The media and the human rights groups frequently reported intense human rights violations by the Myanmar military. During one incident in November, the Myanmar military used helicopter gunships to shoot and kill the villagers. As of November 2016, Myanmar had yet to allow the media and human rights groups to enter the persecuted areas. Consequently, the exact figures of civilian casualties remained unknown. The Rakhine State was termed an "information black hole".Those who fled Myanmar to escape persecution reported that women had been gang raped, men killed, houses torched, and young children thrown into burning houses. The boats carrying Rohingya refugees on Naf River were often gunned down by the Myanmar military.On 3 February 2017, the Office of the United Nations High Commissioner for Human Rights (OHCHR) released a report based on interviews with more than 200 Rohingya refugees, which said that the abuses included gang-rape, mass killing, and killing children. Nearly half of the interviewees stated that family members of theirs had been killed. Half of the women interviewed stated that they had been raped or sexually assaulted: the report described the sexual violence as "massive and systematic". The army and police were stated to have burned "homes, schools, markets, shops, and mosques"...

Question: How many people lost their lives in the first attack?
dozens