Count Raymond II (1115–1152), the grandson of Bertrand, Count of Tripoli, engaged his enemies, Nur al-Din and Unur of Damascus to confront his cousin, Bertrand. The Turkish forces, having only recently battled Raymond II at the Siege of Damascus, attacked the castle of Arima (al-Ariymah). They captured Bertrand of Toulouse, who spent the following decade in Muslim prisons. He was released in 1159 following the intervention of Manuel Comnenus, emperor of Byzantium. Raymond II later regained Arima. In 1152, Raymond II was killed by the Assassins. He was the first recorded non-Muslim victim of this sect.