Burnet Middle School in North Austin was evacuated briefly Friday morning after authorities found a hazardous chemical inside a restroom.
"I was pretty shocked," said Samuel Diaz, a 6th grader at Burnet Middle School in north Austin. "We couldn't go through the hallways and stuff and I couldn't go to my 5th period class."
Diaz and the rest of his classmates were evacuated because a bomb was on campus.
"Someone decided to make an attempt to mix various chemicals in a plastic container, in order to cause that container to rupture, causing an acid bomb," said AISD Police Chief Eric Mendez.
A school resource officer noticed a weird smell coming from the boys bathroom.
At the same time, some students started complaining about irritated eyes and nausea.
District Manger Kurt Brown, with Austin-Travis County EMS, said, "If the concentration had been higher or they had actually completed the device, which I understand it was an incomplete device, it could have spread farther. The vapors could have been denser and more people could have been affected."
The acid bomb did not explode, but fumes were leaking from it.
"The explosion potential is not really what is problematic. It's what chemicals are released after the explosion...it can create severe respiratory issues for anybody in close proximity," said Austin Fire Battalion Chief Palmer Buck.
Four teachers were affected, but refused EMS treatment.
Four students were transported to a nearby hospital.
45 minutes later, the "all clear" was given, but we found plenty of parents showing up early to take their children home.
"I just had to come and pick him up. He's my son and I care about him and I came running over here," said Sandy Diaz.
"On the automated message, I received a call at about 12:35 from AISD," said another mother, Ginger Ward. "She rides the bus home and I'm afraid somebody might try to do some kind of copycat thing."
First responders say an acid bomb is not a prank.
It's illegal and highly dangerous.
Investigators are searching for the person or persons responsible in surveillance video.
Bringing an "acid bomb" on school grounds can fall under the "no weapons" law and could potentially lead to a felony charge.