2:30 p.m. UPDATE:
The lockdown at Emmerson Middle School in Pomona has been lifted.
Pomona Police confirm a CBS 2 News report that there is police activity somewhere near Emmerson Middle School.
Pomona Police Lt. Ron McDonald did not specify what report they had gotten but said officers were out in the area.
According to CBS news, the school was on lockdown. Claremont-La Verne Patch will update as the information becomes available.