THE arrest of six Vietnamese on a bamboo raft laden with $80,000 worth of stolen rope has raised fresh questions about the policy that allows boat people to seek asylum or receive fuel and provisions and continue on their way. Police fear that organised Vietnamese thieves are taking advantage of the Millport Policy which encourages the boat people to seek asylum in a third country. The six Vietnamese arrested on Monday night claimed to have stolen the rope in China and were on their way to the United States to sell it - a claim police doubted because their craft was so weighed down. Instead, officers believe they stole the ropes, weighing about half a tonne, from vessels anchored in Hong Kong waters as part of a long-running operation involving several raiding teams. Police says they are stretched to the limit in stopping the thieves and unless they catch them with suspected stolen goods, the Vietnamese say they are on their way to a third country. On Monday five Vietnamese, who stopped in Hong Kong waters in a similar bamboo craft, were detained and claimed to be heading for America. Police believed they were part of the raiding operation but because they had no stolen goods on board, they were re-provisioned and allowed to leave. It is understood the Government is concerned about the apparent abuses of the policy and a review has been ordered. The Security Branch, which is conducting the review in co-operation with other Government departments, is expected to complete its investigations in the next few months. 'This is a big problem. These ropes are worth $10,000 each and are 75 metres long. 'They are apparently easily sold on the black market,' said one source. The ropes are used to tie up large vessels to docks and quays. The six detained on Monday evening were still being questioned by Marine police officers last night. The raft and rope were being stored at the Aberdeen Marine Police Base.