A Zimbabwean opposition lawmaker has reportedly been arrested after he called President Emmerson Mnangagwa a "dog incapable of leading the country".

According to New Zimbabwe.com, the Movement for Democratic Change (MDC) national executive member, Joel Gabhuza – who is also Binga South lawmaker - was charged with undermining the authority of the president.

Gabhuza allegedly made the remarks during a funeral service in Binga. He criticised the residents for voting for Mnangagwa and his Zanu-PF party on July 30. 

He blamed Mnangagwa for the country's economic decline.

"You people are disabled; you have chosen a dog who cannot rule the country. There is no fuel, medication and I had to go to Zambia to buy fuel, which we have used at this funeral. I have said so and if there is anyone who is angered about this I don't care," Gabhuza was quoted as saying.

An 86-year-old man, who got offended by the lawmaker's remarks reportedly walked a distance of about 100km to a police station to open a case against Gabhuza, said the report.

Fatal shooting

The man accused Gabhuza of insulting Mnangagwa.

Gabhuza was out on a $200 after he appeared in court, the report said.

Gabhuza was not the first Zimbabwean to be charged with insulting the president in recent months. 

A court recently freed on bail a man detained for insulting Mnangagwa while testifying before a commission probing the fatal shooting of six civilians during post-election protests in August, AFP reported.

Prosecutors said Wisdom Mkwananzi, 32, pointed at Mnangagwa's official portrait hung on the wall of a hall where the commission was hearing evidence from witnesses, and said: "I am an orphan because of this man. He killed my parents."

He accused Mnangagwa of leading Gukurahundi, a government crackdown in the 1980s during which rights groups said at least 20 000 suspected government opponents were killed.

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Mkwananzi was released on $200 bail.

Before that,  a taxi driver who reportedly called Mnangagwa a "dog" was also freed by a court after the state failed to prove its case.

According to New Zimbabwe.com, David Ndlovu was arrested earlier this year after calling Mnangagwa a dog in the second city of Bulawayo.

Passing judgement in September, magistrate Gladmore Mushowe said the state had failed to prove the allegation.