At least 13 people were injured by gunfire and 12 were arrested, human rights lawyers and doctors said.
The hike of fuel prices by almost 150 percent is the source of discontent as it has a significant negative impact on the broader state of the economy and the average citizen's cost of living.
He told The Associated Press that it was the only shop open.
The tensions have turned deadly as the army clashed with protesters. Military trucks were seen patrolling the neighbourhood forcing residents to clear makeshift barricades and clean the streets with their bare hands. Eight people were killed Monday when police and military fired on crowds, according to Amnesty International.
The spokesman for the opposition MDC party wrote on Twitter that besides Mawarire, "party leadership" had also been detained.
The military's deployment on January 14 was criticized by the Crisis in Zimbabwe Coalition, a group of several nongovernmental organizations.
"We are ready to do our utmost to make sure that cooperation between our countries benefits our countries, our peoples, that it makes a weighty contribution to the implementation of the plans and the program, which you have outlined for yourselves", Putin said. It said most cases were in Harare and Zimbabwe's second city, Bulawayo. "But we have designated service stations for our diplomats and so on who want to pay in U.S. dollars and it will cost them $1.32 in USA dollars", Mnangagwa said.
She urged people to return to work and said the government forces would guarantee their security.
There were widespread reports of violence as Zimbabwe faced a third day of protests over what has become the world's most expensive gasoline.
An AFP reporter witnessed looting in the city, a stronghold of opposition to the ruling ZANU-PF party.
"[Former President] Mugabe was evil but he listened", he added.
"Mnangagwa has failed, he must go", one protester shouted.
Zimbabwe seems to have jumped from the frying pan to the fire here with that change from Robert Mugabe over to President Emmerson Mnangagwa.
"He lied that our lives will improve, but things are getting worse by the day since he took over". He is set to attend the World Economic Forum in Davos, Switzerland. Alrosa, the world's largest diamond company, has chose to launch operations in Zimbabwe, and we have also signed a series of important agreements that will lead to investment, development and jobs.
Mnangagwa announced fuel pump prices of 3.11 USA dollars per liter for diesel and 3.31 dollars per liter for petrol with effect from midnight Saturday.
Most shops remained closed in Harare, and minibus taxis that usually transport workers from the suburbs to the city centre were not running.
The country's main labour body, the Zimbabwe Congress of Trade Unions (ZCTU) called for a three day stay-away, saying among its demands was for government to urgently address the economic challenges and scrap the usage of the controversial "bond note", which authorities insist is equivalent to the United States dollar.
He said the government would crackdown on "elements bent on taking advantage of the current fuel shortages to cause and sponsor unrest and instability in the country".