Although Vice-President Samia Suluhu said the cause of Magufuli's death was heart failure, Opposition politicians had earlier claimed he'd been diagnosed with COVID-19
Tanzania's president John Magufuli had ordered the arrest of all those involved in the management of the ferry that capsized, killing 136.
More than 100 dead after ferry capsizes on Lake Victoria in Tanzania; President John Magufuli calls for calm
The passenger ferry MV Nyerere was traveling between Ukara and Bugolora when it sank, according to the Tanzania's government agency in charge of servicing the vessels.
Navy chief Admiral Sunil Lanba on Sunday began an eight-day-long two-nation tour of Mozambique and Tanzania with an aim of exploring new avenues of bilateral defence cooperation.
India and Tanzania signed several agreements, including a loan of $92 million for water projects in Tanzania's semi-autonomous Zanzibar islands.
On the fourth day of the Africa tour, Modi visited Tanzania. He had wide-ranging talks with President John Magufuli on maritime security and climate change.
Newly elected Tanzanian President John Magufuli has scrapped independence day celebrations to spend the money on a clean-up campaign, an official statement said.