DENVER (AP) — Officials have closed westbound lanes on Interstate 70 in Summit County after a moving van burst into flames on the roadway. Lake Dillon Fire-Rescue says the van experienced a mechanical malfunction and caught fire Sunday just east of Silverthorne. Fire crews worked to extinguish the blaze. No injuries have been reported. It wasn't clear when the westbound lanes of the highway would reopen. A detour is in place on U.S.