MADISON, Wis. -- La Follette High School officials said the school's lockdown policy could get some changes after a lockdown on Friday, which was triggered by a false report.

Code Red lockdowns were called Friday morning at Sennett Middle School and La Follette High School after a report that a man with a gun was headed toward a school, WISC-TV reported. The report to 911 turned out to be false.

La Follette Principal Loren Rathart said that the lockdown itself went great, saying that all doors were locked and students were under cover within three minutes of the 911 call.

But school officials said that despite notification of all parents by phone and Internet, a huge security concern surfaced.

Rathart said that more than 100 concerned parents came to the school after their children called them on their cell phones.

Staff said they met the parents at the front door and sent them to offices, where things got chaotic.

"We try to discourage that as much as possible because, until we're able to release students and get this place secure, we don't know whether there is a threat. And so having parents come to school may mean that they're going in harm's way," Rathart said.

Rathart said the school will have to improve procedures for parent-student pickups so they are safer and more efficient.

In the meantime, school officials are urging students to stay off their cell phones during emergencies, WISC-TV reported.

The school district's notification system, which taps phones and the Internet, contacted parents after the lockdown to inform them that everyone was safe.

"It's very nice to get that call that your kids are safe again. And both my kids called me to tell me they were safe, and that made me feel good," said Jean Dahl, a parent who has a junior and a senior at La Follette.