Police are still looking for more people in connection with the knife attack on radio talk show host Albert Cheng King-hon despite the arrest of two more suspects on Wednesday. The number of the people arrested in connection with the case increased to 17 when two men aged 27 and 44 were seized in separate operations in Tai Kok Tsui on Wednesday. A police investigator denied claims the two men were the ones who had carried out the August 19 attack. 'Our investigations showed [one of the men] was not linked to the case,' he said. 'He obstructed detectives from entering the flat in Tai Kok Tsui in another operation.' The 27-year-old man was arrested by officers from the Organised Crime and Triad Bureau during a raid on a Tai Kok Tsui flat on Wednesday afternoon. Hours later, police arrested the 44-year-old man when he obstructed detectives attempting to enter a flat in Kok Cheung Street, Tai Kok Tsui. The 27-year-old man was released on bail, while the other man was being questioned.