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.
It said it stood by the "primacy of politics over the gun" and accused General Chiwenga of "treasonable conduct ... meant to incite insurrection".
ZANU PF Youth League leader, Kudzai Chipanga, in a statement said Chiwenga together with Mnangagwa must account for the missing money as they presided over revenue from the country's diamonds.
A number of people posted images of the military vehicles on social media.
The ruling party will next month hold an extra ordinary congress to reaffirm Mugabe's candidature in next year's presidential elections and also amend the party constitution to allow for a female vice president.
"We must remind those behind the current treacherous shenanigans that, when it comes to matters of protecting our revolution, the military will not hesitate to step in", said General Constantino Chiwenga in a statement.
At Least 5 People Dead After Northern California Shooting
One student at the elementary school was hit by gunfire and transported to the local hospital for treatment, Johnston said. Separately, three people were being treated at a hospital in Redding, about 80km north of the shootings.
Isaiah Crowell gets Browns game MVP vs. Lions
Cleveland rookie quarterback DeShone Kizer passed for 232 yards and a touchdown and also carried seven times for 57 yards. Detroit took a 17-10 advantage into the locker room, and the 0-8 Browns left fans wondering what they had witnessed.
New York Times Reports on Louis CK's History of "Sexual Misconduct"
In the hours before the report broke, C.K. allegedly canceled the premiere of his film I Love You, Daddy . While talking to him on the phone, she could hear him masturbating, she said.
eNCA's Zimbabwean correspondent Pindai Dube confirmed the tanks were visible in the streets of Harare, with sources indicating it was a "show of force" rather than a coup.
Earlier this year the country was gripped by a freakish spat between Grace and Mnangagwa that included an alleged ice-cream poisoning incident that laid bare the pair's rivalry.
Chiwenga said ZANU-PF had since 2015 been rocked by infighting, which had afflicted the economy, causing serious cash shortages and soaring prices of basic commodities - rare criticism of those in government by the military.
President Robert Mugabe with his wife Grace Mugabe.
Addressing a press conference in the capital, Chiwenga, a perceived Mnangagwa loyalist, said the purges must stop.
In an unprecedented step, Chiwenga then openly threatened to intervene in politics on Monday if the purge of war veterans did not stop.
Grace, now poised to become a vice president, did not fight in the liberation war.