According to police, more than 40 vehicles were reportedly involved in a takeover that took over the area near Western Avenue and 120th Street, close to the 105 Freeway.
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The second takeover happened near Gage and Hooper avenues, just east of the 110 Freeway, and ended in a shooting.
Police said the victim - who was not identified - was sent to a nearby hospital. His or her condition is unknown.
Investigators located the shooting suspect's vehicle but so far, no arrests have been made.
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On Thursday, the California Highway Patrol along with local law enforcement agencies announced the launch of a new campaign, warning people of the dangers of street racing just as the latest "Fast & Furious" film hit theaters.
"We are engaging in a strong education and enforcement campaign with the goal of keeping all who use California's roadways safe by encouraging others to make good choices behind the wheel," said CHP in a statement.