The Palestinian National Security Forces engage in various activities, including general law enforcement. A rough estimate of the total strength as of 2007 is 42,000 troops. As the Israeli–Palestinian conflict goes on, the security forces notably co-operate with other law enforcement agencies, such as arresting militant sub-groups and assisting the Israeli government with prosecuting those picked up. According to "The Jerusalem Post", "In the past, Palestinian security forces have released arrested terrorists and then quietly tipped off Israel to mitigate internal public criticism against handing over Palestinians to Israel."