AURORA | A fire damaged four units in an Aurora townhouse complex Monday afternoon.

Nobody was injured in the blaze, which was first reported at about 3 p.m. at a home in the 1200 block of South Zeno Way.

Aurora fire spokeswoman Laure Bridges said three units in the four-unit building were heavily damaged and the fourth had minor damage.

Investigators are working to determine what started the fire, Bridges said, but haven’t yet determined the cause.