Singapore authorities have confirmed 41 cases of locally-transmitted Zika virus, which in Brazil has been linked to a rare birth defect, and said more cases were expected to be identified.
Those infected include 36 foreign construction workers employed at a site near Aljunied in the southeast of the island, the health ministry and the National Environment Agency (NEA) said in a joint statement on Sunday.
On Saturday, authorities had confirmed Singapore's first case of a local transmission of the virus, to a 47-year-old Malaysian woman, also from the Aljunied area.
"MOH (the ministry of health) cannot rule out further community transmission in Singapore since some of those tested positive also live or work in other parts of Singapore," the statement said. "We expect to identify more positive cases."