A rangatahi advocate says it's encouraging the government's introducing a fast-track intervention to prevent children from repeatedly committing crimes.

Under the new scheme, announced this morning, Oranga Tamariki and police will agree on a plan to provide support for a child within 48 hours of them committing a serious offence.

And another programme that works with youth offenders in Auckland will be expanded to include 14 to 17 year olds and cover more areas.

Midday Report's Katie Scotcher asked youth worker Aaron Hendry what he thought of the announcement.