A $4 million reward is being offered for the capture of the men who attacked talk show host Albert Cheng King-hon. The reward, the second-biggest after the $5 million offered after the chop attack on journalist Leung Tin-wai two years ago, is made up of $1 million from the police and $3 million from Commercial Radio. Superintendent Ma Wang-chow from the Organised Crime and Triad Bureau, said: 'The $1 million reward offered by police shows how seriously we are taking the case.' He said the reward is effective for six months. Cheng suffered six deep wounds when he was attacked by two men armed with beef knives as he arrived for his morning talk show at Commercial Radio last Wednesday. Detectives looking for the motive have spent nearly 100 hours checking tapes of Cheng's radio and TV programmes. Senior Inspector Todd Bancroft said the work would take another one to two days. He said some 'interesting things' had emerged from the study, but would not give further details. Cheng was still recovering in Queen Elizabeth Hospital last night.