HOUSTON -- Houston police say two 10-year-old boys have been charged with sexually assaulting an 8-year-old boy on a school bus.
The boys were arrested last week after authorities reviewed a security videotape from the bus.
The alleged incident happened in August but the investigation took several months. Houston police spokesman Kese Smith said Tuesday it is not unusual for investigations involving juveniles to take that long.
Houston school district spokesman Jason Spencer says officials were first made aware of the alleged assault when the district's transportation department was asked by a parent on Aug. 30 to review conditions on a bus that transports special needs students to an elementary school.
If convicted on charges of aggravated sexual assault of a child, they could face a sentence of up to 40 years.