Elkhart Central High School was on lockdown Thursday afternoon as police responded to an emergency situation nearby.
The lockdown was lifted around 3:15 p.m.
A school staffer confirmed that students were being held at the school until Elkhart police gave them the all-clear.
Police blocked traffic in the area of Richmond Street and Waterfall Drive near the school.
A dispatcher from the Elkhart City Communications Center confirmed that the roads were closed as police handled a situation involving a suicidal subject in the area.
Elementary school students in the area who ride the bus home may also be delayed in getting home, according to a tweet from Elkhart Community Schools.
Elkhart Central students were held about 35 minutes late, the school corporation tweeted.