Japanese transport minister Keiichi Ishii has called on the country's shipping companies to exercise the utmost caution when operating in the Gulf of Oman.
Ishii was speaking to reporters after a Cabinet meeting on Friday following attacks on two tankers in the Gulf the day before. One of the two tankers is operated by a Tokyo-based shipping firm.
Ishii said it is not yet known who is behind the attacks or how they were carried out. He added that the government is gathering intelligence.
The transport minister said the government, through an industrial body, urged Japanese shipping companies operating vessels in the region to exercise caution.