BREAKING OVERNIGHT: Cops sprung a massive sting on alleged street-racing hooligans in South Los Angeles early Saturday — reportedly detaining hundreds and preparing to haul away scores of vehicles.

The Los Angeles Police Department told The California Post that officers issued a tactical alert at 3:21 a.m. and were still working the scene hours later, as of 9 a.m.

No details were immediately available on arrests or citations from the LAPD.

Video from the scene showed dozens of officers surrounding a massive crowd as people wandered between cars trapped at the intersection of South Figueroa Street and West Alondra Boulevard. Tow trucks stood by, ready to pounce.