COLOMBO, Sri Lanka — Authorities in Sri Lanka have closed the country’s main fish market and widened the curfew in many parts of the island nation following a surge of coronavirus infections related to a new cluster centered on a garment factory.

The government imposed a curfew Thursday in parts of Colombo and some areas outside the capital. Officials already isolated at least six villages elsewhere in the same province, where the new cluster was discovered early this month.

Authorities also suspended operations at Sri Lanka’s main fish market after 49 traders tested positive. Health workers are conducting tests on hundreds of other traders at the market on the outskirts of Colombo.

Schools and key public offices are also closed, public gatherings banned and restrictions imposed on public transport.