Singapore bus and underground railway company SMRT has said that strike action taken by some of its bus drivers over wages has gone into a second day.
The company said that some 60 drivers, all of whom were recruited from China, failed to turn up for work on Tuesday.
This follows similar action on Monday, when the company said that more than 100 drivers failed to turn up for work.
Industrial action does not happen very often in Singapore, and the last major strike took place in 1986.
SMRT held talks with the workers on Monday in an effort to resolve the issue.
BBC reported that media reports stated that the Chinese drivers were unhappy with the amount of money they were being paid in comparison to those from other countries.
SMRT has been hiring foreign drivers to fill a shortage of positions in Singapore.
In an emailed statement the company said that it was continuing to keep communications open.
Singapore's Ministry of Manpower said it was closely monitoring the situation.
