.....From NBC News 8 Tampa.... TAMPA -- A small aircraft crashed into southwest corner of the Bank of America downtown building at 5 p.m. Saturday, officials said. The aircraft was spotted by a U.S. Coast Guard helicopter who was doing routine patrol, officials said. The building is located at Morgan and Ashley streets. Witnesses said the plane appeared to be flying between the Bank of America and Am South buildings. But it crashed into the 20th or 25th floor of the Bank of America building, officials said. One official said there appeared to be one or two offices damaged in the building. He called it minor damage. ````It was a huge thud,'' said Nick Cashion, a witness. ```` Debris came down to Ashley. I thought I wasn't looking at it correctly. I thought it was going to go past the Bank of America building.''