COLOMBO, Sri Lanka — Authorities in Sri Lanka have banned all public gatherings as a new cluster of coronavirus infections expands in the Indian Ocean island nation.

Health authorities said early Wednesday that the outbreak centered at a garment factory has risen to 830 confirmed cases while more than 1,000 people have been asked to quarantine at their homes.

The health ministry ordered a halt to gatherings such as exhibitions, parties, conferences, indoor or outdoor events, carnivals, musical shows and processions. Officials already imposed a curfew in two suburbs of Colombo where many of the patients live, closed schools and restrictws public transport.

The cluster emerged Monday, a day after Sri Lanka reported its first community infection in two months. The country has reported 3,733 cases during the pandemic, with 13 deaths.