Two students were taken to the hospital after their school bus crashed in the US city of Houston Thursday, local media reported. The incident happened Thursday morning on a loop near a freeway in southwest Houston, the website of the Houston Chronicle reported. The Houston Independent School District officials said seven students were aboard the bus headed to M.C. Williams Middle School when the incident occurred. Two of the students were taken to the hospital. Their conditions were not released. The other students onboard were placed on another school bus and continued to the campus. It's not clear how the crash happened. No other details about the incident were available. Though the United States is reputed for its strict school bus safety code, such accidents are not uncommon. At lease two other accidents involving school buses were reported in Texas in the past week. On Dec. 13, nine elementary school students were hurt when their school bus was rear-ended by a pickup in north Texas. On Dec. 11, nine students were injured after their school bus collided with another school bus in east Texas.