Rt Rev Christopher Foster's been speaking to Premier after two more teenagers died over the weekend.
Yousef Makki and Jodie Chesney were killed in separate knife attacks in different parts of the country.
The Bishop of Portsmouth, who's sitting in the House of Lords this week, says many people need to take responsibility for the issue.
He said: "This needs to be a coordinated response.
"It needs to begin in the home, then schools certainly are important and there is no doubt that the work of the police, particularly perhaps the community support officers, can be really critical in encouraging and helping young people and in prevention too."
The Metropolitan Police has said tackling violent crime remains its top priority but says it wants to work with others to prevent young lives being lost.
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