TAIPEI, Taiwan - The Criminal Investigation Bureau (CIB) yesterday arrested a notorious duo of rapists that haunted northern Taiwan for the past three years.

The police tie the two suspects, Yen Yung-tai, 32, and Lu Peng-tien, 33, to seven reported cases of sexual assault, although they also believe that there are more victims that have remained silent. Out of the seven reported cases, three involved teenage girls, the youngest aged only fourteen at the time of the alleged assault.

The two were tracked down by the CIB through the use of DNA (deoxyribonucleic acid) samples. The police urged any victims who have stayed silent to come forward and report their cases to the police.

The duo began their spree of violence in June 2006, when they posed as policemen and stopped an underaged girl riding her motorcycle in Xinzhuang, Taipei County. They told her she was being taken back to the police station for questioning. The girl was assaulted in a public toilet, and the duo fled the scene.

On September 5 of that same year, the pair stopped another girl riding a motorcycle in Linkou, Taipei County, demanding to see her license. She refused, and the pair assaulted her in some bushes nearby.

On May 9, 2007, the pair approached a betel nut stand near Su Ao, Ilan County, pretending to be interested in buying NT$1,000 of betel nuts. The shopkeeper could not take her two daughters, both in middle school, to school because she was too busy packing the nuts, so asked the pair to take them to school. Both daughters were assaulted by the pair in their car.

On March 29 this year, the pair told a young woman that they would help her find a job. Instead, they tricked her into a motel room, got her drunk, beat her, and raped her six times in the span of two hours. They also suffocated her with a pillow.

Yan is a former member of the army's special forces, and bragged to the police about keeping three girlfriends at the same time.

Two of his girlfriends have given birth to Yan's children. There is also a warrant out for the arrest of Yan's younger brother, who is also wanted in relation to sexual assault charges. Yan told the police he assaulted the girls because he wanted more excitement.

Lu is married with a two year-old child. Lu admitted to the police that he carried out his crimes also to seek excitement.