A teacher of a private school at Belthangady in Dakshina Kannada district has been arrested for allegedly abetting the suicide of a girl student by sending a derogatory message about her to a classmate, police said on Tuesday.

The girl, a resident of Pijathadka in Dharmasthala, who was in a critical condition after she allegedly attempted suicide by consuming poison, died at a hospital in Bengaluru on Monday, they said.

She was admitted to a hospital in Mangaluru on February 7 and was shifted to Victoria hospital in Bengaluru two days back for advanced treatment.