The U.S. is seeking “a new era” for Zimbabwe, the State Department’s top official for Africa said, implicitly calling on long-time President Robert Mugabe to step aside as a political crisis mounts.

In an interview with Reuters, acting Assistant Secretary of State for African Affairs Donald Yamamoto appeared to dismiss the idea of Mugabe, who has ruled Zimbabwe for 37 years, remaining in a transitional or ceremonial role.

“It’s a transition to a new era for Zimbabwe, that’s really what we’re hoping for,” Yamamoto said.

Zimbabwe’s army seized power on Wednesday, in an apparent effort to prevent Mugabe, 93, from handing power to his wife.

He has not resigned or been formally deposed, however, and he was pictured on Thursday shaking hands with the military chief, Constantino Chiwenga.

Yamamoto, speaking on the sidelines of a meeting with African Union officials at the State Department in Washington, described the situation in Zimbabwe as “very fluid.”

He said the U.S. would discuss lifting multiple U.S. sanctions on Zimbabwe if it began enacting political and economic reforms.

In a message for Zimbabwe’s political leaders, he said: “Our position has always been that if they engage in the constitutional reforms, economic and political reforms, and move forward to protecting political space and the human rights, then we can start the dialogue on lifting sanctions.”

The U.S. has not given aid to Zimbabwe’s government for many years, but provides development aid to nongovernmental groups, particularly for healthcare.

“Now whether we give to the government, that depends on what happens in Zimbabwe.”

U.S. Secretary of State Rex Tillerson is due to meet on Friday in Washington with 37 African foreign ministers.(Reuters/NAN)