Something going on at CV / La Crescenta Elementary?

Was heading south on La Crescenta Ave this morning towards the 210E by CV and La Crescenta Elementary and noticed power was out at the Foothill intersection and then saw a ton of police and CHP cars right by the school and blocking off the intersection right by the school there. The cops had me turn left towards Rosemont and as I was doing so I saw a couple lines of kids being lead out of the school grounds.

Did something happen here or was it just a power outage of some sort? Anybody know what’s going on?