Tanzania’s interior minister, Patrobas Katambi, said on Friday the government was banning all political rallies because of security threats.
Katambi made the announcement in remarks to lawmakers in parliament, but did not say how long it would last.
Protests have been planned for July 7, a public holiday, to call for democratic reforms and justice for people killed in election violence last year.
A government-appointed commission of inquiry said in April that at least 518 people were killed in the unrest. Tanzanian authorities have denied allegations that the security services used excessive force.
The commission placed the blame for the violence with the protesters. The main opposition party has said thousands were killed in the election unrest.
President Samia Suluhu Hassan was declared the winner of the presidential election last year with nearly 98% of the vote.
She said the election unrest was an attempt to overthrow her government and received foreign funding.
