BANGKOK — Authorities in Thailand say they plan to expand coronavirus testing to thousands of factories in a province near Bangkok as they reported 365 new cases around the country and one new death.

Authorities have focused their efforts on migrant workers in Samut Sakhon, a province next to the capital that has been the epicenter of a new outbreak and where thousands work in its mainly seafood processing factories and markets.

They have has also focused on trying to trace itinerant gamblers who travel widely around the country and are blamed for a second major hotspot outside Bangkok.

Thailand’s COVID-19 coordinating center said Wednesday that of the 365 new cases, 250 were local transmissions among Thais, 99 were migrant workers and 16 were arrivals to the country isolated in quarantine centers.

That brought the total since the pandemic began to 9,331, including 66 deaths.

Taweesilp Visanuyothin, a spokesperson for the COVID-19 coordinating center, said there were plans to test workers at more than 10,000 factories in Samut Sakhon, 100 of which have more than 500 employees each.