Protesters branding school lessons about LGBT rights as "toxic" and "disgusting" have been accused of using "appalling" and "incendiary" language.
It follows footage of continuing rallies at a Birmingham primary school where the lessons have been taught.
A man can be heard telling a crowd outside Parkfield Community School that teaching about social difference is "aggressive indoctrination".
Police are reviewing the video to see whether any offences are committed.
The footage - in which a vocal and supportive audience is told homosexuality is incompatible with Islam - was taken outside the school.
On Thursday, Birmingham City Council's cabinet member for social inclusion John Cotton said: "In recent days, we have been appalled to see attempts to divide the people of our city by using insulting and incendiary language targeting the LGBT community."
While Parkfield is an academy, not a local authority school, Mr Cotton said the council was monitoring the situation. [BBC] Read more
