Tracks group of men across school via sound

I stiffened.

I could hear the familiar rumble of a portal opening nearby. The PRT had tried a number of ways to secure as many portals as they could in the school, to the point that people were complaining about some of the nonsensical new construction. But there were portals that they couldn’t do anything about.

“A portal just opened,” I said. I focused. “It’s the one in the hall.”

“How do you…?” Vicky asked.

“Thinker,” I said.

I could hear the sound of a dozen pair of boots on the floor. The strides were heavy, and they were moving with the kind of unison usually only seen in marching bands and militarizes.

***

“Twelve intruders, portal nine. They’re headed north,” I said.

***

“They’re heading for the cafeteria,” I said grimly.

***

“They’re splitting up,” I said after a moment. “There’s two exits to the cafeteria for the students, and presumably another through the kitchen, where supplies and the employees come through. The last thing they’re going to want is to leave one of them open. It sounds like they’re splitting up into teams of four.”

***

Lockdown-Intruders