Singapore overtook Indonesia in coronavirus infections and now has the most cases in Southeast Asia after the city-state detected hundreds more victims among low-wage foreign workers.

Authorities said an additional 596 cases were confirmed as of noon Sunday, bringing the total to 6,558 in the country. Of the 596, only 25 are Singaporeans or permanent residents, the health ministry said in a statement.

Since late March, the Southeast Asian nation has seen a surge in local transmissions that’s largely affected foreign workers housed in tightly packed dormitories, further complicating efforts to curb the spread. The government has tightened entry rules, mandated masks, poured billions of dollars into the economy and imposed a weeks-long partial lockdown to contain the outbreak.

With the new tally, Singapore moved ahead of Indonesia, which now has 6,248 cases, and the Philippines with 6,087 cases. The two countries are expected to release their latest figures later on Sunday.