Singapore shares closed in the red on Tuesday, tracking broader regional losses over the recent clash between the US and Iran near the Strait of Hormuz.

The Straits Times Index (STI), a key benchmark for the Singapore Exchange, ranged between 5,028.80 and 5,072.08 throughout the day. It ended the session at 5,028.80, down 41.75 points or 0.8% compared to Monday's close.

The two parties had a skirmish near the Strait, which could have an impact on an interim peace deal.

Boustead down over 13%; AEM SGD, Top Glove down around 6%; CityDev, SGX, Keppel down around 2%; SATS up nearly 6%.

In economic news, Singapore's manufacturing output jumped 17.6% in April, backed by strong growth across almost all clusters, the city-state's Department of Statistics reported.

On the corporate front, shares of Boustead Singapore sank over 13% at the close even after its profit attributable to equity holders surged 235% during the fiscal second half ended March 31 to SG$197.7 million from SG$59.1 million a year earlier.

SATS shares closed nearly 6% higher as its attributable profit to owners rose to SG$135.4 million in fiscal second half ended March 31 from SG$109.1 million a year earlier.

Meanwhile, shares of Global Resource Construction closed nearly 8% higher as its subsidiary, Chip Eng Seng Contractors, secured a civil engineering works project worth SG$95.7 million from the Housing & Development Board.