the associated press is reporting and they are quoting gary stevenson a hospital spokesman as sayingter has been subdued and detained. the hospital spokesman says the shooting was on the 8th floor of the main hospital building. he says that the floor remains locked down. we had heard earlier that the entire hospital was being evacuated that according to police in baltimore. no confirmation on that as we take a look at the pictures now from google maps. we also don't know the condition of the doctor who apparently was shot. whoever this person was, they were able to get up into the 8th floor of the main hospital building there, and this is a complex with many, many different buildings. they went into the main building, shot a doctor, and apparently then barricaded themselves inside of a room on the 8th floor, taking a hostage with them, and again reports now that the shooter has been subdued and detained, according to the hospital spokesman, gary stevenson. so we are working on trying to confirm all of this ourselves so we don't have to rely on other sources but that's the word right

i'm gary stevenson. first of all, i would like to reiterate the thanks for the mayor's office, the city of police departments, the fire department and other tactical units involved. we train for these things at hopkins. i know they train for these things as well. with the tragedy occurring, trz enormously gratifying to see things go as planned. their response was breathtaking. they were here within moments. they were efficient. behaved in an exemplary manner in the face of this horrible situation. i am not at liberty to reveal details about our physician who was injured. he remains in the o.r. based on our initial assessment, the wounds do appear to be survivable wounds. i cannot answer any questions regarding the shooter or the shooter's mother. these are due to federal patient privacy laws. >> can you confirm -- >> i am not at liberty to confirm that now. we'll make a full statement with full detail. >> so we're learning a key piece of information about this standoff that lasted for about four hours at

the last time the hospital spokesman talked, gary stevenson said that the shooting happened on the eighthoor of this main hospital building, we're calling it the nelson building. he says that the eighth floor is on lockdown, and that baltimore police have said we're evacuating parts of the hospital. we're not evacuating the entire complex nor all of the 30,000 people who work here but certainly parts of the hospital that would be most at risk if the situation spiraled out of control. those are going to be the parts of the hospital they're concerned about evacuating. let's bring in clint van zandt as we're working to get more information here. clint, if you have a gunman who reports were, at least according to the baltimore sun, listening to the police talk over their communications, that there may have been a relative involved here, what would be the best approach to go about getting him to surrender into their custody? >> well, contessa, of course the first thing you want to do is isolate him so he can't harm any other medical personnel or patients. so notwithstanding police officers and