WATERLOO, Iowa (KWWL) -- There is a large police presence in the residential area a few blocks east of Kittrell Elementary School.
As of 1 p.m. on Sunday, a KWWL crew on scene says police have blocked off the area between Ohio St. and Wisconsin Street along Easton Avenue. The city's SWAT vehicle was also spotted on scene.
Authorities could be heard trying to negotiate with an unknown subject in a home.
Waterloo police have not confirmed the reason for the police response.
This is a developing story that will be updated as more information becomes available.