According to the Billings Gazette, an ExxonMobil oil pipeline just east of the Laurel (MT) Bridge ruptured around 11:30 p.m. Friday July 1, dumping oil into the Yellowstone River. In a press conference Saturday morning, Yellowstone County and ExxonMobil officials said they don’t know yet what caused the break in the 12-inch pipeline or how much oil escaped into the river. The oil slick started in Laurel and, with the speed of the river, had moved to Custer by about 9 a.m. A light sheen of petroleum can been seen along banks and in eddies all down the river between the two points. >More