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When the big rig departed the San Mateo County Event Center that night, it touched off a complex choreography that culminated at an Interstate 5 truck stop about 70 miles north of Los Angeles.

Added to that is the growing amount of consumers’ attention taken up by TikTok, YouTube and video games, including from San Mateo, Calif.-based Roblox.

Gunmen have killed the mayor of the Mexican municipality of San Mateo Piñas in the latest deadly attack on local officials.

About 500 of them could be in San Francisco; about 300 apiece in San Mateo and Marin counties; nearly 200 in Alameda County and 33 in Contra Costa County.

The waters off San Mateo County have among the highest number of reported shark encounters in California.