adelphi for several hours. we're here live off new hampshire avenue in the area of oak view drive. you can see lots of s.w.a.t. team members are out here and here to explain how this all started at 10:30 i'm told is corporal maria mckenny with prince george's county police. this all started at 10:30 you said with an arrest warrant. let's start from the very top. >> shortly before 10:30 yesterday evening, prince george's county police officers responded to the 8100 block here in adelphi, maryland to assist u.s. marshals who were attempting to serve an arrest warrant on an individual. once the officers got on scene and shortly thereafter, a barricade was called. >> reporter: we know that every one in the area is safe. we don't believe that the suspect at this point is holding anyone hostage. you were explaining that other people have been evacuated? >> that is correct. individuals who have been affected, who are at the target location of the apartment