A man whose information led to the arrest of five suspects over a VCD shop fire-bombing in Mongkok could receive a reward of up to $300,000, despite contacting police before the offer was made. The man, in his 30s, was among 20 to 30 people who contacted police regarding the attack in which two men hurled two Molotov cocktails into the ground-floor shop in Allied Plaza on January 28, injuring three pedestrians. Superintendent Lo Wai-chung, of Kowloon West regional crime unit, said the man made contact before the $300,000 reward was offered on January 30. But Mr Lo said the man might still be given the reward. A decision would be made when the case was complete. On Wednesday, 80 detectives raided nine addresses in Kowloon and the New Territories, arresting five men, aged between 16 and 27. Police last night charged four of them with arson. They will appear in North Kowloon Court today. The remaining suspect, aged 24, was released on bail last night.