Forty graves at Charlton Cemetery were knocked over, broken or had photographs removed on 16 March.

Because the graves were easy to identify as Muslim, the case was handed over to Scotland Yard's specialist race crime task force.

The three youths, who are aged 13, 15 and 16, have been released on bail for 10 days.

Detective Chief Inspector Clive Driscoll said he had been "absolutely delighted" with the help police had received from the public.