DAR ES SALAAM, Jan. 15 -- PRESIDENT John Magufuli has tasked four newly sworn-in high commissioners to rigorously embark on economic diplomacy by exploring new areas of development cooperation in countries to which they have been posted.

He was speaking at the State House in Dar es Salaam shortly after swearing in the ambassadors who have been posted to four African countries, three of which are member states of the Southern African Development Community (SADC).

"The countries to which you have been assigned have huge potentials for the economic development of our country. You should thus exploit those opportunities," he told the envoys.

The high commissioners who were sworn in are former Director General of the Tanzania Intelligence and...