The MV Abdullah was hijacked off the coast of Somalia last week, the latest of more than 20 attacks since November.
The government has also instructed parents not to allow children to play outdoors.
President Samia Suluhu and her Kenyan and Ugandan counterparts discussed issues touching on common interest.
Nothing is sacred as political outfits employ outright bribery, infiltration and espionage, physical assault, disinformation and state-sanctioned...
Earlier plan to construct a 452-kilometre road to link Arusha to Musoma was stopped by activists.