Three 14-year-old boys in year 8 have agreed to leave the elite Cranbrook School after a sexual incident involving a 14-year-old girl at “a gathering” in Sydney's eastern suburbs.

It is the second such incident involving young Cranbrook boys and equally young girls in recent months and has again turned the spotlight on the early sexualisation of children and their constant bombardment, via the internet and the media, with sexually suggestive imagery.

The incident involving the year 8 boys is said to have taken place in the grounds of Bronte Public School after the girl sent a text message to one boy and arranged to meet him. The girl is alleged to have had consensual sex with one boy, but the two other boys present then allegedly engaged in acts, short of sex, with her as well. Accounts differ as to whether marijuana and alcohol were involved.

Cranbrook principal Nicholas Sampson said the boys had left the school.