An Indian national was on Friday jailed for three weeks by a Singapore court for filming women changing in toilets, media reports said.

27-year-old Kuldip Singh used his mobile phone to film the first woman changing, but was caught after his second victim discovered him and raised the alarm, The Straits Times reported.

Singh, who works as a driver, became a "peeping Tom" by following the women on two separate occasions.

He admitted to criminal trespass and insulting the modesty of the two victims.

The court heard that on October 13, Singh had arrived with a colleague at 50 Science Park Road to collect chemical waste.

He followed the victim, a 37-year-old technical writer, into the female toilet but was caught after she spotted him and screamed for help.

Police later discovered a video clip on Singh's phone. Investigations revealed that some time in April, he had filmed an unknown victim in a toilet at a local technical college.

Deputy public prosecutor Sruthi Boppana said Singh had "boldly ventured" into the female toilet to intrude on the victims' privacy.

Pleading for leniency, defence counsel Sarbrinder Singh said his client had done a foolish act.

The lawyer added Singh was due to get married on Christmas but the plan was off because of the case.

Singh, who pleaded guilty to two of four charges, could have been jailed for up to three months and fined up to SG$1,500 for each count of criminal trespass.

He faced up to a year in jail and a fine for each count of insulting his victim's modesty.