Luke could tell that it was the two residents in the basement who were yelling for help.
They were the only people who had a walkie-talkie.
Luke rose quickly and ran to the basement, activating the walkie-talkie. "Don't panic, I'm on my way. What's going on over there?"
The walkie-talkie was quiet for a moment. Then, the residents yelled in panic again. "Spiders! A lot of spiders are coming from the underground parking lot! They're chasing as!"
Luke said calmly, "Retreat to the stairs. I'm coming to get the both of you."
He was already on the first floor, and made a beeline for the basement.
Despite his calm expression, his heart was a little heavy.
The residents had been able to hold on in the shopping center because the spiders at the entrance didn't have a real leader. They were basically relying on instinct, and were drawn here by the gunshots.