On 27 April 1984, Shin Bet agents arrested 25 people, predominantly settlers in the West Bank and the Golan Heights. The arrests followed an extensive two-year investigation led by the head of the Serious Crimes Division and employing ninety policemen. One reason given to explain why, as opposed to the rapid results in tracking down and arresting Palestinian militants, the Jewish suspects had managed to remain operative and undetected for 5 years, was that, with Palestinian cases, Israel applies the British Mandatory Emergency Defense Regulations code of 1945, whereas the Shin Bet is required to observe the Israeli criminal code procedures with Jewish suspects, procedures which do not foresee administrative detention, placing arrested suspects in isolation for 2 weeks, demolishing homes and other forms of pressure to obtain breakthroughs.