Tanzanian authorities have arrested dozens of people in a crackdown ahead of planned anti-government protests that seek democratic reforms and the release of a key opposition figure. Sylvester Mangure, an army spokesperson, issued a warning against demonstrations on Sunday, following a government ban on political rallies.

Mangure accused unidentified individuals of recruiting youth to participate in the protests and falsely claiming army support. The planned demonstrations for Tuesday coincide with the 72nd anniversary of the ruling party's establishment. Protesters also demand the release of opposition leader Tundu Lissu, who faces treason charges stemming from his calls for electoral reforms prior to last year's general election.

President Samia Suluhu Hassan won the October election with 97% of the vote, a result disputed by opposition parties. The election was marked by a widespread boycott and the absence of candidates from the two main opposition parties, Chadema, led by Lissu, and ACT Wazalendo. A government-appointed committee reported that more than 500 people died during three days of violent demonstrations challenging the electoral process, though human rights groups and opposition leaders claim a higher death toll.

On Sunday, Mangure urged citizens to report any recruitment or organization of protesters, stating the army would maintain the country's peace and take action against those disrupting it.

Security has been significantly increased in Dar es Salaam, Tanzania's commercial capital. Soldiers and police are patrolling major roads and public spaces. Critics suggest this heightened security is intended to deter demonstrators, though authorities have not directly linked it to the planned protests.

Dar es Salaam will also host the 50th Dar es Salaam International Trade Fair, known locally as SabaSaba, on Tuesday. Police spokesperson David Misime stated on Saturday that law enforcement agencies had intensified operations and apprehended groups allegedly mobilizing people for what authorities deem illegal demonstrations.

"Strong action will be taken against anyone who participates in the unlawful riots being mobilized through social media," Misime said. Prime Minister Mwigulu Nchemba confirmed last week that arrests had been made for recruiting youth to participate in Tuesday's protests, but did not disclose the number of individuals detained.