TISHOMINGO, Okla. — Six teenage students have been killed in a two-vehicle collision in southern Oklahoma, the Oklahoma Highway Patrol said Tuesday. The students were in a passenger vehicle that collided with a semi about 12:30 p.m. in Tishomingo, a rural city of about 3,000 located about 100 miles (161 kilometers) southwest of Oklahoma City, according to OHP spokesperson Sarah Stewart. Stewart said she did not have details of the collision or the exact ages of the students, but that all six victims were female. The condition of the semi driver was not immediately known. Images from the scene …