Two men who raped a schoolgirl on her 16th birthday were jailed yesterday after being told by a judge they had undoubtedly caused her psychological damage. The teenager threatened to leap from a building soon after the attack and had to be rescued by police. 'It goes without saying that rape is a very nasty and cowardly crime and the more so when more than one man is concerned,' said Deputy Judge Colin Jackson in the Court of First Instance. Chan Yiu-cheung, 18, was jailed for five years for rape plus 18 months for plotting to pervert the course of justice. He had arranged for the victim's mother to be offered $100,000 to drop the case. Yu Wai-yip, 18, was sentenced to six years for rape. A third attacker, Leung Ka-wai, 17, found guilty of indecent assault, was sent to a detention centre. They attacked the girl at Chan's home in April last year. The abuse stopped when his mother intervened.