 Complete the following phrase:  Traditionally security for the prime minister has been provided by the Sri Lanka Police. After the establishment of the office of Prime Minister in 1948, a sub inspector of the Ceylon Police Force had been assigned for personal protection of the prime minister, until S. W. R. D. Bandaranaike dismissed his personal protection officer. When Bandaranaike was assassinated, only a lone police constable stood guard at the entrance of his residence. Following the Bandaranaike assassination, the successive prime ministers received a police guard headed by a sub inspector. This was supplemented by the Armys Field Security Detachment following the 1962 attempted coup détat and during the 