The Indian Navy's frontline frigate INS Tarkash has seized over 2,500 kgs of narcotics in the Western Indian Ocean, officials said on Wednesday. The operation was launched after receiving intelligence on suspicious movements of vessels on March 31. INS Tarkash intercepted and boarded a suspect dhow, guided by a P8I marine surveillance aircraft and the Maritime Operations Centre in Mumbai. A specialist boarding team, including Marine Commandos, discovered over 2,500 kgs of narcotic substances (including 2,386 kgs of hashish and 121 kgs of heroin) onboard the vessel.