Police arrested eight residents and merchants in the Old City of Jerusalem on Tuesday on suspicion of not preventing a crime following the murder of Adiel Kolman in the Arab Quarter on Sunday. According to the police, the detainees, aged 15-67, "noticed the incidents and did not act to prevent and /or minimize the harm to the murdered civilian."Two of the detainees were released after interrogation. The other six were brought to the court to extend their remand."Israel Police will carry out a full investigation with the goal of bringing the suspects, those who could have prevented or minimized the harm and could have saved the victim's life, to justice," read the police statement. Police added that it's forces have been deployed across Jerusalem, including the Old City to foil attempts by anyone seeking to harm innocents.Kolman, 32, a father of four, was killed on Sunday evening as he left his job at the City of David museum in the Old City, where he worked as a security guard, and headed in the direction of Jerusalem’s light rail.A terrorist stabbed him in the upper part of his body as he neared the area of the Lion’s Gate entrance to the Old City of Jerusalem. He was rushed to the Shaare Zedek Medical Center in serious condition and died just before midnight.His killer was identified as 28-year-old Abd al-Rahman Bani Fadel, a Palestinian from the West Bank. According to Israel’s Shin Bet security agency, Fadel had received a permit to look for work and had spoken to several vendors in the Muslim Quarter before carrying out the attack. He was shot and killed on the spot.Anna Ahronheim and Tovah Lazaroff contributed to this report.