South Korea’s presidential office says it has suspended a review of whether to participate in a US operation to escort ships through the Strait of Hormuz after President Donald Trump put the mission on hold, Reuters reports.

A Blue House official also said it was still unclear if a South Korean-operated vessel that suffered an explosion and caught fire on Monday had been attacked in the strait.

“After checking additional information, it seems to be unclear whether the vessel was attacked,” Wi Sung-lac, South Korea’s presidential national security adviser, told a briefing.