**A small, single-engine private plane has crashed into a seven-storey office building in Austin, Texas.**Smoke could be seen billowing from the building, which houses offices of the federal tax agency.
Most employees have been evacuated but one person is unaccounted for, a spokesman for the Austin fire department said.
The building is next door to FBI field offices, but the bureau said there was no indication the crash was deliberate.
A Department of Homeland Security spokesman said there was “no reason to believe there is a nexus of criminal or terrorist activity at this time”.
A spokesman for the Austin fire department said the plane hit the building at 0956 local time (1556GMT).
He said two people had been taken to hospital, but it is not clear if they were seriously injured.
The fire department has cut power to the area to help them tackle a blaze at the scene.