A long-delayed Los Angeles County effort to combat gang violence is set to begin in May, officials said.

The $1.1-million initiative is much smaller than what was initially envisioned in 2007 -- a Marshall Plan-style effort to tackle Southern California's persistent gang problems through a multi-agency approach, focusing not only on law enforcement, but also child development, job creation, education and public health programs in areas dominated by gangs.

In its place is a limited, 15-month pilot program targeting 100 youths under the custody of the county's troubled Probation Department. The program was approved Tuesday by the Board of Supervisors.

The Regional Gang Violence Reduction Initiative calls for programs to be set up in four neighborhoods -- the Florence-Firestone and Harbor Gateway neighborhoods in the South Los Angeles area, Pacoima in the San Fernando Valley and the Monrovia-Duarte area in the San Gabriel