The recent cases of people getting burnt by corrosive chemicals at public areas could be connected.
The police told The Straits Times on Friday night that they are investigating the cases, and are not "ruling out the possibility" of them being linked.
In the past two weeks, there have been two such incidents. On Thursday, a 24-year old nurse, Ms Wan Zahfirah Arshad, had her left buttock burnt by a corrosive substance on a train seat. She has been treated at the Singapore General Hospital (SGH) and the spokesman said her condition is stable.
On April 17, School of Science and Technology student Aung Phone Naing, 14, suffered second-degree burns on his right thigh after sitting on a "transparent liquid" at a bus stop along Bukit Batok East Avenue 3.
Although his wound is healing, the incident has shaken him. These days, he no longer sits down while waiting at that bus stop. "It's partly because I'm worried," he said.
The Commander of Jurong Police Division, Deputy Assistant Commissioner of Police Wilson Lim, said: "Police are determined to bring the perpetrators to justice".