The crash was reported at 11:58 a.m. at California Street and 12th Avenue, fire Lt. Mindy Talmadge said.
Talmadge said multiple vehicles were involved in the crash, but did not know how many.
Of the four people injured, one declined transport to a hospital.
None of the injuries were believed to be life-threatening, Talmadge said.
Dan McMenamin, Bay City News