The bank said it was informed at 11am today that the employee was confirmed to have Covid-19. The person fell sick on March 27 and went to hospital for a test the following day.
The bank has already asked its staff at the branch to go into self-quarantine at their homes under Public Health Ministry rules.
The branch will reopen on April 13.
The bank has informed the Public Health Ministry and the Bank of Thailand.
It has also advised customers who used its services at the branch from March 16-27 to isolate themselves for 14 days and closely observe their condition.