In a statement, MPA said: “As liquefied butane has a high evaporation rate, MPA has assessed that any leaked butane would have been carried southward away from mainland Singapore, where most of it would have rapidly dissipated to below flammable levels within an hour and pose no risk to shipping.”

Astro Saturn also sustained damages to its port anchor and bow.

Both Crystal Sunrise and Astro Saturn reported no injuries to their crew. The vessels have now been stabilised.

As a precautionary step, eight PSA Marine staff present in the surrounding area of the collision received medical check-ups at a hospital. MPA is currently investigating the incident.