Ugandan authorities say more than 100 people have been placed under quarantine as health officials work to contain a rare Ebola outbreak linked to the Bundibugyo strain of the virus.

More than 300 suspected cases and 88 suspected deaths have so far been reported, primarily in Congo but also in neighboring Uganda.

There are currently no approved Bundibugyo virus-specific therapeutics or vaccines and the extent of the spread is uncertain, the WHO says.