[Additional reporting indicates that crash was, in fact, deliberate.]

“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. “