Lawrence firefighters responded to a call of a semi-truck fire in the Graystone Apartment complex parking lot at 5:44 a.m. Wednesday.

According to division chief Joe Hoelscher, fire fighters were dispatched to the 500 block of Graystone Street for a heavily involved fire involving a semi-truck. Hoelscher said it took fire fighters several minutes to extinguish the flames in the parked semi. He said the officers are conducting a routine investigation and a damage estimate was not yet available.