An alleged plot to oust some Birmingham head teachers and make their schools adhere to more Islamic principles is being investigated, it has emerged.
A letter detailing the plan, known as "Operation Trojan Horse", claims responsibility for leadership changes at four schools.
Fifteen schools in Birmingham are being inspected as a result of allegations of an "Islamic takeover plot", the Department for Education has said.
Anonymous claims that hard-line Muslims were trying to take over the running of some city schools were made in a letter sent to local authorities last year.
Ofsted inspectors have so far visited 12 schools in the city.
The Department for Education said it would take firm action where standards were not being met.
