A $2 million reward is being offered for the capture of the man who killed a security guard in last week's robbery in Tsuen Wan. The reward - the same amount offered to trace Hong Kong's most wanted man, Kwai Ping-hung, and his six gang members - is made up of $1 million from the police and $1 million from Hang Seng Bank. Security guard Zafar Iqbal Khan was hit three times during the raid on a Hang Seng Bank branch at Belvedere Garden last Wednesday. The robber fled with nearly $500,000. Assistant Commissioner of Police (Crime) Peter Yam Tat-wing said they had stepped up interceptions at all border checkpoints and issued a photofit picture to all frontline officers. The composite image was made after officers located several domestic helpers who witnessed the robber taking off his balaclava following the robbery. Mr Yam refused to say whether the gun used to kill the guard was a stolen police revolver. On March 14, constable Leung Shing-yan was shot dead and his loaded revolver and six rounds of ammunition were stolen after he was lured to a bogus noise complaint in Tsuen Wan. A $1 million reward has been posted to help solve the murder but the killer is still at large and the gun has not been recovered. The suspect wanted in connection with Khan's murder speaks fluent Cantonese, is about 1.78 metres tall and of strong build. He was wearing a dark balaclava, a long-sleeved red pullover, dark sports trousers and white gloves and was carrying a black bag. Anyone with information is urged to call the police hotline on 2527 7887 or contact any officer or station. Information can also be given by letter to General Post Office Box No 999 or the Crime Information Faxline on 2520 2828. The reward is valid until June 10.