All lanes of Interstate 65 near Seymour south of Indianapolis were shut down for several hours Monday morning because of a semitrailer fire. Police say the truck carrying a highly flammable material called Xylene caught fire about 7:50 a.m. Monday as it was traveling northbound. A cause of the fire wasn’t immediately known and no injuries were reported. Authorities closed the highway to all traffic between U.S. 50 at Seymour and State Road 250 at Uniontown. Southbound lanes reopened about 10:30 a.m., but northbound I-65 was expected to remain closed for most of the day.