Crackdown on Melbourne youth crime

Nearly 400 young people have been arrested for robberies, public disorder and vehicle crimes across suburban Melbourne.

It comes amid a police crackdown on youth crime in city's southeast, with 396 arrests made and 126 warrants issued since April 1.

In one case, two teenage girls were arrested over a failed mugging of a woman near Dandenong station.

"This is just one example of how (the police operation) is helping us to hold offenders to account," Superintendent Paul Hollowood said on Monday.

"We continue to see significant results like this every single day."

Nearly 280 traffic fines and 50 crime infringements have also been issued as part of the crackdown, dubbed Operation Tidal.