SINGAPORE, June 7 -- A private tutor in Singapore is being investigated by authorities after allegedly helping a 13-year-old student purchase an e-cigarette.

The incident came to light after the girl's secondary school contacted her father on May 21 to inform him that his daughter had been caught with a vape device.

According to Shin Min Daily News, the school's discipline master said the girl had admitted to asking her Chinese tutor to help buy it online.

The father, surnamed Zhu, 33, told the paper he was "extremely shocked" and later checked his daughter's chat history with the tutor.

"I saw that the tutor purchased the e-cigarette online and even sent screenshots to my daughter. She handed the e-cigarette to my daughter on May 19,...