London schools are not "supported well enough" to deal with knife crime, Ofsted has said.
Research by the education watchdog found that schools in the capital lacked the resources to address the "complex societal problems" behind increasing knife violence, with 39 fatal stabbings taking place across the UK this year alone.
The report has called for schools to link up with external agencies such as the police and local authorities, and become "fully involved" in local community safety partnerships in an effort to crack down on instances of knife crime.
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Ofsted has also called for the Metropolitan Police to work more closely with schools, and "ensure that it and schools routinely share information about children for the purposes of safeguarding”.
The report was based on research carried out by Ofsted in 29 schools, colleges and pupil referral units, as well as focus groups with parents and children.
Mike Sheridan, Ofsted's regional director for London, said: "Schools should be fully involved in local knife crime strategies, but too few are brought around the table.
"Schools work effectively to keep their pupils safe, but they can be isolated from each other and other agencies, leading to inconsistencies in the way schools approach this issue."