A 27-year-old Lansing resident was sprayed with mace and his backpack was stolen about noon Thursday in the 1100 block of East Grand River Avenue, East Lansing police Capt. Juli Liebler said.
The man received facial injuries in the assault.
A police K-9 unit, which uses search dogs, was called to the scene but couldn't find the assailant. He is described as a white male, 25 to 30 years of age, wearing a dark hooded sweatshirt and sunglasses, she said.