dr. henry belo. it's unknown what prompted him to open fire. >> everyone is in shock. we're just worried about the other employees or the other people that might have been gotten injured. >> reporter: people are being treated, one of the victims is confirmed dead. five other shooting victims are not known at this point. they're treating this as workplace violence and don't believe it's connected to international terrorism. chris malone, nbc news new york. >>> police in the district in prince georges county are cracking down on atv and dirt bike riders who have been taking to the streets. two departments released dozens of photos of these suspected riders. they say they've been terrorizing the communities with vehicles that were not meant to be on the road and on the sidewalk. that includes the national harbor. investigators say they may have and indiana. this weekend expect to see more police in the area that have been targeted. we have posted the images of these riders on our nbc washington facebook page, take a look. >>> news 4 i-team reveal spike in theft in our reg

dr. henry belo, a former doctor at bronx lebanon hospital. this is still a very active and fluid situation. >> polo, thanks very much. we'll monitor that briefing while you remain on the scene for us. there is another news this hour of a threat against two tv hosts now embroiled in a bitter public feud with president trump. joe johns is joining us from the white house. joe, the president is on the way to his new jersey golf course right now, but there is a lot of controversy hovering over him. >> reporter: that's absolutely right, wolf. it was felt here at the white house, too. there is a big meeting here today of two presidents both new to the job, and the topic could have been all about the global challenges in the korean peninsula. but instead, for the second straight day, the president's mean tweets kept getting in the way. the president's oval office meeting with the south korean president aimed at focusing on escalating tensions with north korea and. overshadowed by two msnbc hosts, the president tweeted, watched low rated morning joe f

dr. henry michael belo.e was a family medicine doctor, formerly employed at the hospital, according to sources. pregnant woman who was in the hospital's pediatric unit said panic broke out when they learned a shooter was in the hospital. minutes ago we heard from an emt who was inside the hospital treating one of the doctors who had been shot. >> reporter: what was the situation like inside the hospital? describe it. >> a lot of people screaming, yell. in this situation no one is ready for it. but this situation, we're taught to be calm and to be -- if so helping them. >> we are expecting police to give us an update on this situation at any moment. we'll update you when we're updated. >>> we are also following breaking developments in our area, new effort to crack down on dangerous a tvs before the busy holiday weekend. today police released dozens of photos of people they say are terrorizing others on every street, as they ride around doing stunts on a tvs and dirt bikes. it's believed some of them come fro