An 11th-grade girl had acid thrown on her by two unknown assailants as she left school Thursday in what rights groups are calling the first attack of one so young.
Acid attacks in Cambodia are usually punitive measures on perceived mistresses and can be horribly disfiguring.
Rights groups immediately demanded police find the culprits.
The school's principal said Kiri Chariya, who is recovering in a hospital in Vietnam, had no apparent conflicts with classmates.