SINGAPORE, July 31 -- The seven migrant workers who helped rescue a woman from a sinkhole along Tanjong Katong Road South have been invited to meet President Tharman Shanmugaratnam at the Istana.

According to CNA, the President's Office said it had invited the workers, along with other guests, to the Istana open house this Sunday.

The workers are site foreman Pitchai Udaiyappan Subbiah, 47, his colleagues Velmurugan Muthusamy, 27; Poomalai Saravanan, 28; Ganesan Veerasekar, 32; Bose Ajithkumar, 26; Narayanasamy Mayakrishnan, 25; and Sathapillai Rajendran, 56.

"There will be opportunities for interaction between the guests - including the migrant workers - and the president during the Istana open house," the President's Office said.

Th...