Fire Alarm @ Farmers

While working in the department store, an alarm suddenly went off , thought someone accidentally hit a closed door to trigger the alarm. But after a while a staff asked all people to leave the building to assemble outside.

Upon clarifying with the one of the staff who is wearing the orange jacket (as I thought it was a fire drill), she said it's not as they didn't receive any notice for that. 

Looks like something is happening in the apartment located at the top of Farmers department store. All the residents were told to evacuate from the apartment. But after about 15 minutes, they were allowed to go back into the apartment. So, we also went back to resume our works. Didn't exactly know the reason why it happened.

This is the apartment as mentioned.