Singapore index futures were down 0.5 percent, signalling a lower start for the benchmark Straits Times Index .

Asian shares, the euro and oil prices fell on Thursday as surging borrowing costs in troubled Spain heightened fears that more countries in the euro zone will be hit hard by the regions' debt crisis.

0846 (0046 GMT)

(Reporting by Charmian Kok in Singapore; charmian.kok@thomsonreuters.com)