In 1845 Siyu gave Seyyid Said one of his greatest military defeats, in this battle the famous Amir Hemed was killed and was buried in Rasini where his grave exists to date. Seyyid Said used to pay tribute to his grave at Rasini every year. It is believed Amir Hemed was very swift with his sword to the extent of stopping all arrows and spears shot at him in battlefield. The soldiers of Siu knew about this and during this battle two archers from the Siu army shot two arrows at him in one second targeting his armpit. When Amir Hemed swiftly lifted his sword to stop the first arrow the second shot his chest from the arm pit. It was a poisoned arrow and it killed him instantly. Seyyid Said planned a revenge to avenge the death of his cousin. After a while he cheated almost all the rulers, advisors and generals of Siu into a diplomatic mission with him in Zanzibar, but he turned this into a massacre mission for the rulers of Siu. They were advised by the sultan to leave behind all their weapons since it was a diplomatic one. Upon arrival in Zanzibar, Seyyid Said individually asked every individual in the Siu mission the whereabouts of Amir Hemed and everybody who answered that he is dead was killed instantly by the Sultan. Some of the diplomats who answered that Amir Hemed is still alive were spared but they were imprisoned for life at fort Jesus in Mombasa which was also under the Sultan then. After the Sultan of Zanzibar massacred almost all the rulers of Siu, he forcefully arrested the ones remained in Siu town and deported them to Mombasa for imprisonment at fort Jesus along with the others who survived the Zanzibar Massacre.