MILL CREEK -- Police are investigating an attempted assault reported Tuesday morning in Mill Creek.It happened at 7:39 a.m. outside an apartment building in the 13500 block of Heatherwood Drive, Mill Creek police Cmdr. Ken Neaville said.The girl told police she was walking in the area when a man tried to grab her and pull her hair, Neaville said. The girl ran away. She was unhurt.Details about the suspect were limited Tuesday. Anyone with information should call detectives at 425-921-5704.