Thirteen people were arrested for driving under the influence at a DUI checkpoint held Saturday night in Fresno, authorities said. The checkpoint took place at Belmont Avenue and Clark Street from 9 p.m. to 3 a.m., according to officials. In addition to the DUI arrests, 42 drivers were cited for operating a vehicle without a license or with a suspended or revoked license. In total, 268 vehicles were contacted during the operation, police said. O…