HARARE (Reuters) - Two armoured personnel carriers were positioned on the outskirts of Zimbabwe's capital late on Tuesday and soldiers were directing traffic, a Reuters witness said, a day after the head of the army threatened to intervene in politics.

The soldiers deployed on Harare Drive, a major thoroughfare, ordered passing cars to keep their windows up and not ask questions.

"Don't try anything funny, just go," one soldier said to a Reuters reporter.