Sri Lanka, Oct. 29 -- Health authorities have raised concerns over a possible resurgence of malaria in Sri Lanka, as imported cases among returning travellers continue to rise.

The Anti-Malaria Campaign confirmed that 27 individuals have tested positive for malaria this year, most of whom were Sri Lankans infected while overseas.

Officials warned that the increase in imported cases could lead to local transmission if preventive measures are not strictly followed.

"We are seeing more travellers returning with malaria, which poses a serious threat of reintroducing the disease to the country," the campaign said.

Given the situation, all returnees are urged to undergo malaria testing upon arrival.

Sri Lanka was certified malaria-free by ...