According to KTVU in San Francisco,

Smith, 27, was detained after he and two other passengers in a Yukon sport utility vehicle were questioned after the vehicle struck an undercover police car on the China Basin Street side of the city’s Public Safety Building around 8:30 a.m., police said.

Smith was detained for public intoxication and expected to be released when he is sober and no charges will be filed, police said. Police said Smith and another man were being driven by Smith’s girlfriend, who was later tested for driving under the influence.