Both Zimbabwean President Robert Mugabe's famous "blue house" and the Zimbabwean Broadcasting Corporation (ZBC) has been sealed off by heavily armed military personnel, Khuluma Afrika is reporting. The Independent was unable to verify where the military vehicles were travelling to and for what goal.
Reuters reported earlier on Tuesday that two tanks were seen headed to Harare.
This comes a day after a statement by army generals urged President Robert Mugabe to cease purges within his ruling party or "the military would be forced to intervene".
Four people have been arrested for booing first lady Grace Mugabe at a rally. "Especially now when the army chief has threatened to step in, I think that something is going to happen soon", witness Clement Gomo, who was driving towards Chinhoyi, told German news agency DPA by phone.
Zimbabwe's Army Commander General Constantine Chiwenga is pictured during the country's 28 years Independence celebration in Harare on 18 April 2008. "It is very unusual considering that we normally see a few soldiers in uniforms during their pay days". A DPA reporter saw the president's official vehicle and motorcade parked at his office in the afternoon.
His main rivals within the ruling Zanu-PF party are the younger Generation 40 or G40 group, which has Grace Mugabe's support.
Mnangagwa fled into exile, vowing to return and has launched a direct challenge to Mugabe by calling for members of the ruling party to desert the president. The long-serving veteran of Zimbabwe's 1970s liberation war, had been viewed as a likely successor to Mugabe before the president fired him.