An illegal immigrant from the mainland was arrested in a police hunt yesterday following an attempt to rob a hiker in Tai Tam Country Park. Hiker Yeung Kai-wing, 28, was stopped just after 9am by a man brandishing a box cutter while walking in North Point along the Wilson Trail - a popular hiking route on Hong Kong Island. 'The robber dashed out from bushes and intercepted the hiker. He threatened the victim with a cutter and demanded money,' a police spokesman said. 'The victim ignored his demand and ran off. He immediately called police on 999 with his mobile phone to seek help.' The suspect was later intercepted by police in Mount Parker Road, Quarry Bay, carrying a cutter. The mainlander reportedly told officers he went to the country park after swimming across the border from Shenzhen on Friday. He was being held for questioning at North Point police station last night. There has been a spate of robberies in country parks this year, including one on June 7 when a 64-year-old hiker was robbed by a man armed with an axe while hiking along Hammer Hill Road, near King Lai Court in Wong Tai Sin. On May 6, Leung Wai-ho, 41, was tied to a tree for 17 hours by robbers in Pokfulam Country Park. Police said $65,000 was withdrawn from his bank accounts after the attackers took his bank cards and forced him to reveal his PIN. On February 29, a couple was tied up to trees for 12 hours in Tai Tam Country Park after being robbed by four Putonghua-speaking men. The police spokesman said there had been 13 robberies in country parks in the first five months of the year. Eighteen robberies were reported in the city's country parks in the whole of last year. In May, police unveiled a pilot safety scheme intended to help counter the rising spate of robberies against hikers. Under the plan, 30 signposts showing a grid reference and emergency telephone number will be erected every 500 metres in some parks, including Lion Rock and Kam Shan, for use by distressed hikers. Police Commissioner Dick Lee Ming-kwai has said the force is extremely concerned because such robberies affect Hong Kong's reputation as a safe city. But he said the size of the country parks made policing difficult. Police have urged hikers to walk in groups and keep in contact with friends and family members. They have also been advised not to carry unnecessary amounts of cash or bank cards.