Top naval commanders of South Korea, the United States and Japan gathered in Seoul on Wednesday to hold a series of talks aimed at strengthening their trilateral maritime security cooperation, the South’s Navy said.

The gathering brought together Chief of Naval Operations Adm. Kim Kyung-ryul, U.S. Pacific Fleet Commander Adm. Stephen Koehler and Adm. Akira Saito, chief of staff of the Japan Maritime Self-Defense Force, for bilateral talks and a trilateral dinner meeting, according to the armed service.

The meetings came amid heightened tensions in the Middle East, raising speculation over whether their talks would address the ongoing U.S. blockade of Iranian ports.

U.S. President Donald Trump earlier called on South Korea, Japan and others to send warships to the Strait of Hormuz to help secure shipping lanes.

In the bilateral talks between Kim and Koehler held earlier in the day, both sides exchanged opinions on the robust South Korea-U.S. combined defense posture as well as cooperation in the area of naval maintenance, repair and operations, the Navy said.

Kim and Saito, meanwhile, held in-depth discussions on expanding personnel exchange and resuming joint maritime search and rescue exercises (SAREX) as discussed in a ministerial meeting between their defense chiefs earlier this year, it added.

In January, Defense Minister Ahn Gyu-back and his Japanese counterpart, Shinjiro Koizumi, met in Japan and agreed to resume joint SAREX drills for the first time in nine years as part of efforts to strengthen bilateral defense cooperation.

The top admirals of the three countries were set to attend a dinner meeting later Wednesday to likely discuss trilateral coordination measures to respond to and deter North Korea’s advancing nuclear and missile threats.

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