Water cannons and a heavy riot police presence are outside a court in Zimbabwe's capital as the organizer of the country's largest shutdown protest in nearly a decade is set to appear.

Evan Mawarire, a pastor, arrived at the court in Harare on Wednesday, a day after police charged him with inciting violence and disturbing the peace.

Dozens of activists wearing Zimbabwe's flag are singing, chanting slogans and praying outside the court.

Many people answered Mawarire's call on social media last week for a job boycott to protest dismal economic conditions under longtime President Robert Mugabe.

Another boycott had been called for Wednesday, but the response appeared muted. The government has warned organizers of further protests that "they will face the full wrath of the law."