Laidlaw Transit has been targeted by a $1.4 million lawsuit filed by the Charleston County School District in South Carolina.

The school district claims that Laidlaw overcharged for its school bus services during the past two years. According to the lawsuit, Laidlaw went beyond the usual per-bus charges for magnet school transportation during the 1997-98 and 1998-99 school years.

Laidlaw officials told the Associated Press that it’s “unfortunate that the Charleston County School District has elected to take this course of action.” The Burlington, Ontario-based contractor said it expects to win the case.