PHOTOS: State transportation crews have reopened all southbound lanes of Interstate 5 in Seattle Thursday evening after a vehicle carrying liquid oxygen caught fire and exploded, snarling traffic for motorists through the midday and afternoon commute. No injuries were reported during the incident, which resulted in the closure of both north- and southbound lanes near downtown Seattle for over an hour. Shortly before 6 p.m., state officials said on social media that there was a 4.5 mile backup on the interstate even though the westbound State Route 520 ramp to southbound I-5 was open as well as Boylston Avenue. Officials said they expected to reopen all lanes of I-5 sometime Thursday night. State transportation officials tweeted about 7:30 p.m. that the lanes had reopened.