Kuala Lumpur police official Ku Chin Wah says authorities have stepped up street patrols after receiving reports of 22 such incidents in less than three months.

He says in a statement seen Tuesday that the men typically splash a corrosive chemical liquid on women who are walking alone to public transport stations. Authorities have not determined a motive.

Media reports say the latest victim was hospitalized this past weekend for damaged eyesight and minor face burns.

Other victims included young female students and a mother carrying her baby. Most of them suffered skin irritation.