Twenty-two people have lost their lives following a landslide at a mine in northern Tanzania, officials said on Sunday.

The accident occurred in Simuyu region's Bariadi district, more than 500 kilometres north of the capital, Dodoma, burying the miners under heavy debris.

"As we close the rescue operations, the death toll remains 22, all men," Faustine Mtitu, acting commander for the region's fire and rescue force, told reporters on Sunday.

"We are convinced that there are no more bodies trapped in the rubble," he said, adding that safety procedures had not been followed at the mine.

President Samia Suluhu Hassan expressed her "great sadness" over the accident, paying tribute to the victims on Sunday.

"These fellow Tanzanians were small miners in the area, trying to earn a living for themselves, their families and contributing to the development of our nation," she said in a post on X.

It was unclear when the landslide occurred and officials did not provide details on the cause of the accident.

Tanzania is the fourth-largest African producer of gold, one of the East African nation's main sources of foreign currency.

Mining accidents are not uncommon, with miners often lacking the tools and materials considered necessary to operate safely. (AFP)