Hong Kong ( CNN ) -- For the second time in a week , suspected Hong Kong organized crime syndicates -- known better as triads -- have targeted the production of `` Transformers : Age of Extinction '' being filmed in the Chinese territory . Four men attempted to extort an undisclosed sum of money from a crew member inspecting a rooftop shot location in the district of Kowloon Tuesday , the Hong Kong Police told CNN . Police arrested and charged one 35-year old man with blackmail but his three partners remain at-large . The attempted shakedown follows a suspected triad incident October 17 in which two men assaulted Transformers director Michael Bay . Bay , 48 , explained that every vendor that experienced disruptions from filming in the area `` got paid a fair price for our inconvenience '' but one man `` wanted four times that amount '' -- around $ 13,000 ( 100,000 Hong Kong dollars ) . `` I personally told this man and his friends to forget it , '' said Bay . `` We were not going to let him extort us . He did n't like that answer . '' The man returned an hour later , `` carrying a long air-conditioner unit , '' added Bay . `` He walked right up to me and tried to smack my face , but I ducked threw the air unit on the floor and pushed him away . '' Hong Kong police arrested two brothers in connection with the incident . In both episodes , triads -- known for their dealings in smuggling , prostitution and illegal gambling -- are believed to be involved . `` The two incidents associated with Transformers are indicative of low-level attempts to extort money from a big production by persons who may be triad members , '' said Steve Vickers , former head of the Royal Hong Kong Police Force 's Criminal Intelligence Bureau and now CEO of Steve Vickers and Associates , a specialist political and corporate risk consultancy . `` The separate side of this is that the triad control of the movie industry in Hong Kong is a very complicated issue and has been in place for many years , '' added Vickers . `` The triads strangle the oxygen out of the local movie scene . They 're not just extorting people for money . It 's control of movies , starlets and distribution . '' In recent years , triad-related crimes in general have been on the rise , according to crime statistics from the Hong Kong Police Force . For three years in a row , from 2010 to 2012 , the number of triad-linked incidents rose nearly 15 % . Most recent data for the first half of 2013 , however , shows 988 triad-related crimes -- the second lowest reported number for the same time period over the past decade . But `` reported crime is not an accurate measure of triad influence , '' said Vickers . `` Triad related crimes are under reported . ''
Suspected Hong Kong triads target Hong Kong Police Force filming second time in a week . Four men demand money from production team ; one arrested , one escape . Shakedown follows assault on Transformers director Bay for $ 13,000 . Hong Kong Police Force -related crimes rose 15 % a week , says Hong Kong Police Force .