it is on southgate right at 280 and 1 in daily city.

southgate avenue and cerro drive. this is not far from seton medical center. kpix 5's joe vazquez on an afternoon of drama that ended with a new clue just a few minutes ago. joe. >> reporter: right, liz. just within the last few minutes, police announced that they have found a bullet fragment on the second floor of that medical building at 1500 southgate here in daly city. this is some four hours after the first several people including a doctor said they heard gunshots. >> somebody fired a gun. >> we were just in for this appointment. we were locked down. >> a doctor had first reported seeing a -- encountering a man in the hallway and carrying a gun. as the doctor was departing the scene here, he believes the gunshot fired. we have escorted a number of people out and we are in the process of clearing the building to safely evacuate any remaining occupants. they were initially instructed to "shelter in place" and so we're doing the office-by- office search to clear each building safely, each office. >> scariest thing i have ever been through. so i don't know. it just was really loud and i was talking to a patient at that time and i said to her, oh, my god, did you hear this? and