Sirens last night?

Any idea what all th sirens were about around 9:30 pm or so...? It was quiet for a while and then more sirens as they seemed to leave the area near Telmex.

I hear sirens every night....

sirens??
If more than one, probably an ambulance and/or police vehicles dealing with a traffic accident.  Usually home call emergency ambulance service only requires one vehicle.
Sometimes traffic offenders have to be hauled down with sirens......robbery suspects almost always with a longer chase.

I didn't hear them.
The power was out.