Walking home from school Monday wasn't an option for 7th grader Emily Nesheim.
"We thought there was a bomb threat or there was someone in our school," she said. "My friend thought someone was going to come and shoot us."
Whittier Middle School students were kept at school until Sioux Falls police said it was OK to leave.
"I'm really thankful they did the lockdown right away," said Emily's mom, Jodi. "It's a little bit chaotic in there right now, but they're getting it under control, so we're really thankful."
Pelly Ginger agreed, "They're good teachers, good staff. They're going to take care of our kids."
Sioux Falls Police Spokesman Sam Clemens says officers initially responded to a call about a suicidal person that turned into someone barricaded in a house across the street from the school.
"People were yelling. We didn't know. I knew it wasn't a practice because they would have warned us a week ago probably, but they started screaming at us to get down in the locker room, so we just did it," said Emily.
After a bit of commotion, the Whittier Middle School community is thankful for quick action.