Armed Zimbabwean soldiers sit on top of a military tank in Harare, Zimbabwe Wednesday, Nov. 15, 2017. At least three explosions were heard in Zimbabwe's capital early Wednesday and military vehicles were seen in the streets after the army commander threatened to "step in" to calm political tensions over 93-year-old President Robert Mugabe's possible successor. The ruling party accused the commander of "treasonable conduct." (AP Photo/Tsvangirayi Mukwazhi)

Armed Zimbabwean soldiers sit on top of a military tank in Harare, Zimbabwe Wednesday, Nov. 15, 2017. At least three explosions were heard in Zimbabwe's capital early Wednesday and military vehicles were seen in the streets after the army commander threatened to "step in" to calm political tensions over 93-year-old President Robert Mugabe's possible successor. The ruling party accused the commander of "treasonable conduct." (AP Photo/Tsvangirayi Mukwazhi)

HARARE, Zimbabwe (AP) — In an extraordinary statement after taking over the state broadcaster during a night of unrest, Zimbabwe’s army said early Wednesday it was only targeting “criminals” around President Robert Mugabe, and sought to reassure the country that “this is not a military takeover.”

Mugabe and his wife were safe and sound, the army spokesman said.

“As soon as we have accomplished our mission, we expect that the situation will return to normalcy,” the army spokesman said, calling on churches to pray for the country. He urged other security forces to “cooperate for the good of our country,” warning that “any provocation will be met with an appropriate response.”

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Overnight, at least three explosions were heard in the capital, Harare, and military vehicles were seen in the streets. On Monday, the army commander had threatened to “step in” to calm political tensions over the 93-year-old Mugabe’s possible successor. The ruling party accused the commander of “treasonable conduct.”

The U.S. Embassy closed to the public Wednesday and encouraged citizens to shelter in place, citing “the ongoing political uncertainty through the night.” The British Embassy issued a similar warning, citing “reports of unusual military activity.”

For the first time, this southern African nation is seeing an open rift between the military and Mugabe, the world’s oldest head of state who has ruled since independence from white minority rule in 1980. The military has been a key pillar of his power.

It was not clear where Mugabe and his wife were Wednesday but it seems they are in the custody of the military. “Their security is guaranteed,” the army statement said. The president reportedly attended a weekly Cabinet meeting Tuesday.

“We wish to make it abundantly clear that this is not a military takeover,” the army statement said. “We are only targeting criminals around (Mugabe) who are committing crimes that are causing social and economic suffering in the country in order to bring them to justice.”

The statement called on troops to return to barracks immediately, with all leave canceled.

Overnight, The Associated Press saw armed soldiers assaulting passers-by in Harare, as well as soldiers loading ammunition near a group of four military vehicles. The developments came several hours after the AP saw three armored personnel carriers in a convoy heading toward an army barracks just outside the capital.

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Mugabe last week fired Vice President Emmerson Mnangagwa and accused him of plotting to take power, including through witchcraft. Mnangagwa, who enjoyed the military’s backing and once was seen as a potential president, fled the country and said he had been threatened. Over 100 senior officials allegedly supporting him have been listed for disciplinary measures by a faction associated with Mugabe’s wife, Grace.

The first lady appeared to be positioned to replace Mnangagwa as one of the country’s two vice presidents at a special conference of the ruling party in December, leading many in Zimbabwe to suspect that she could succeed her husband. Grace Mugabe is unpopular with some Zimbabweans because of lavish spending as many struggle, and four people accused of booing her at a recent rally were arrested.

On Monday, army commander Constantino Chiwenga issued an unprecedented statement saying purges against senior ruling ZANU-PF party officials, many of whom like Mnangagwa fought for liberation, should end “forthwith.”

“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,” the army commander said. The state-run broadcaster did not report on his statement.

Showing a generational divide, the ruling party’s youth league, aligned with the 52-year-old first lady, on Tuesday criticized the army commander’s comments, saying youth were “ready to die for Mugabe.”

On Tuesday night the ruling party issued a statement accusing the army commander of “treasonable conduct,” saying his comments were “clearly calculated to disturb national peace and stability” and were “meant to incite insurrection.”

Frustration has been growing in once-prosperous Zimbabwe as the economy collapses under Mugabe. The country was shaken last year by the biggest anti-government protests in a decade, and a once-loyal war veterans association turned on the president, calling him “dictatorial” and blaming him for the economic crisis.

“Mnangagwa was held out by many as the best hope within ZANU-PF for piloting an economic recovery,” analyst Piers Pigou with the International Crisis Group wrote Tuesday.

Now, “Mugabe will have to employ all his guile if he intends to ensure continued accommodation with the armed forces.”