Lebanon's security commanders appear concerned that they will be the target of a backlash in wake of the withdrawal of Syria's military. Lebanese sources said security commanders have sought to lower their profile amid the end of the Syrian military and intelligence presence in Beirut. They said several security commanders have already left Beirut, with at least one of them departing the country. The biggest concern by the security commanders has been that they will be charged with the assassination of former Prime Minister Rafik Hariri or accused of abuse by victims of Lebanese or Syrian intelligence, the sources said. On Thursday, Lebanon's security chief denied that his agency was connected to the Hariri killing in February. "All the heads of security institutions are ready for trial and accountability," General Security Directorate chief Gen. Jamil Sayed told a news conference in Beirut. "We have no secrets to be ashamed of."