The Milwaukee Police Department is looking for a missing 9-year-old boy. Investigators say Osvaldo Sandoval-Robles was last seen around 11:30 Sunday night in the 1600 block of South 11th Street in Milwaukee. 

Sandoval-Robles is 4'5\" and 75 pounds. He has brown hair and brown eyes and was last seen wearing a long-sleeve blue shirt and blue jeans. Police say it's possible he's on a dirt bike. They consider this a \"critical missing\" case because of the boy's age.

If you've seen Sandoval-Robles or have any information about him, call the Milwaukee Police Department's Sensitive Crimes Division at (414) 935-7401.