Emergency officials set up a triage area in Edward R. Murrow Park today after 20 to 30 people in an I Street office building were overcome by pepper spray. There was a bit of confusion at first as to the source, but it appears that a juvenile with the irritant is to blame. The building in question is 1919 I St. NW. The intersection of I and 19th streets, where the Farragut West metrorail station is, has been shut down, the AP reports via the Post.