An Australian warship patrolling the Indian Ocean has seized more than a tonne of heroin worth A$289 million ($268 million) from a dhow in Kenyan waters, Australia's Defense Department said on Friday. The frigate, HMAS Darwin, intercepted the vessel on Wednesday night 27 nautical miles east off Kenya's port city of Mombasa and confiscated 1,023 kg (2,255 pounds) of heroin in 46 sacks hidden in bags of cement, the department's website said. The drugs were destroyed, the online statement said. "This is a major heroin seizure, which has removed a major source of funding from terrorist criminal networks," Commander Terry Morrison, HMAS Darwin's Commanding Officer said.