Police arrested 38 suspected triads during raids in Tin Shui Wai in an overnight operation that ended at daybreak yesterday. The male suspects, aged 14 to 50, were accused of involvement in triad-related offences, recruiting for the society, and trafficking and possession of dangerous drugs, police said. They were being held for questioning and no one had been charged The raids, conducted by the organised crime and triad bureau, began at about 8pm on Thursday at a number of locations in Tin Shui Wai and Yuen Long. The operation ended at 5.30am. The action is believed to be part of the 11/2-month joint 'Thunderbolt' operation by Hong Kong, Macau and Guangdong police against triad- related activities. It began on June 1 and is expected to be completed in the middle of next month. A police officer said the operation targeted 'active triad gangs, their income sources and cross-border crimes'. So far, about 100 people have been arrested and more than HK$1 million worth of illicit goods seized in Hong Kong. Police said the seizures included pornographic discs and smuggled electronic goods. The operation started with the arrests of 26 people in a Sai Kung restaurant on June 1. The 23 men and three women were suspected of attending a meeting of an unlawful society. Five of them were released unconditionally and the others were granted bail. Police nabbed 20 people the following day and seized HK$15,000 in cash in a North Point residential flat that was allegedly used as a triad-controlled gambling den. Last week, officers from the Kowloon West regional crime unit arrested several people and seized about 70,000 pornographic discs in a warehouse. Marine police caught 10 people, including five suspected mainland prostitutes, and seized HK$200,000 worth of smuggled electronic goods in two separate high-speed sea chases on June 1 and 4.