At least 200 police officers equipped with masks, gloves and tools will spend the next four days sifting for drugs amid heaps of plastic in a Tuen Mun warehouse following the largest cocaine bust in the city's history. Describing conditions as 'hot, filthy, smelly and dusty', officers from the Narcotics Bureau and Police Tactical Unit took turns searching for bricks of cocaine and other drugs in the 10,000 sq ft godown in Fuk Hang Tsuen village, one of two sites raided over the past few days. Police have arrested eight people so far and seized 567kg of cocaine, estimated to be worth some HK$600 million in the two raids. The godown was believed to be the key storage centre for a South America-based drugs syndicate. The other raid was carried out in Yuen Long over the weekend Acting Superintendent Gemini Fan Chor-fun of the drugs bureau said the search of the godown was like 'working in an oven', with temperatures exceeding 40 degrees Celsius and ventilation limited. 'There is a strong smell from the plastic waste and swarms of mosquitoes flying,' she said. 'The officers have to change face masks frequently as they get dirty pretty quickly.' Fan said officers, equipped with spades, pliers and gloves, had to watch out for sharp edges in the ceiling-high piles of crushed plastic. Forklifts and a crane lorry were also brought in. She said the search would take four days and about 20 large fans had been brought in for ventilation. A police spokesman said a small quantity of cocaine had been found in the warehouse yesterday. The search began on Friday night after police arrested an American and five Mexican nationals and seized 50 kilograms of cocaine in Tuen Mun. They were charged with trafficking dangerous drugs. Sniffer dogs led police to another 467kg of cocaine concealed in the waste piles, which took up half the space at the recycling warehouse. The six suspects appeared in court yesterday, each charged with one count of drug trafficking. American Heric Rivas, 24, and Mexicans Josue Mario Bravo Galindo, 31, Maria Elena Bazua Tapia, 33, Talina Prieto Vazquez, 27, Elmer Murillo Medina, 40, and Jose Duarte Gomez, 36, entered no plea in the Tuen Mun Court. According to court documents, Rivas is a meat merchant, Bravo Galindo a salesman and Gomez a logistics firm employee. Tapia and Vazquez were identified as housewives while Medina was unemployed. Acting Principal Magistrate Pang Chung-ping adjourned the hearing until November 14. On Saturday, police arrested man and woman in Yuen Long after finding 50kg of cocaine in an apartment in Cheung Sha Wan. The two were granted bail. Previously, the largest seizure of cocaine reported by the police was in April last year, when the disappearance of a Dutch-Chinese visitor, Chang Ma-kee, led to the confiscation of 372kg of cocaine from a village house in the New Territories.