A father of 13-year-old girl filed a police report following the discovery of his daughter's sexual relationship with a 23-year-old man.

Kampar district police chief, Supt Ng Kong Soon said the victim's father was shocked to read a brief message about the "relationship" through the WeChat application on his daughter's mobile phone.

The concerned father then lodged a police report which subsequently led to the arrest of the suspect on grounds of allegedly raping a minor.

According to Ng, the incident occurred when the suspect and the victim got acquainted on Nov 8 via WeChat before agreeing to meet in Kampar town six days later.

"After several days, the suspect and the victim met again on Nov 20 and the suspect invited the victim to have sex in a public toilet at Plaza Kranji in Jalan Market.

"Although the victim initially refused, she finally gave in after he promised not to leave her," Ng told Astro AWANI.

Ng said, the suspect repeated the same act two days later at the same place.

He said the matter was finally discovered by the victim's father when he read the WeChat conversation on his daughter's mobile.

"The victim then finally told her father everything before lodging a report at the Malim Nawar police station," Ng added.

The victim has since been taken to the O&G specialist at the Raja Permaisuri Bainun Hospital for checkup.