The world’s largest direct-membership organization for shipowners, charterers, shipbrokers, and agents is warning that while it is still unclear how Iran will respond to Saturday’s U.S. attack on Iran’s nuclear facilities, the threat to commercial shipping in the waters around the Arabian Peninsula has risen.

“The Houthi threat against shipping in the Red Sea and Gulf of Aden has also gone up,” said Jakob Larsen, head of security at Bimco, which represents global shipowners. “The Houthis now threaten merchant ships with affiliation to Israel or the U.S., but attacks against merchant ships with other affiliations cannot be ruled out.”

Larsen said it is expected that U.S. warships and merchant ships affiliated with Israel or the U.S. would be the preferred targets for the Iranians.

Integrated logistics provider Maersk announced Friday it is temporarily suspending port calls to Israel’s largest container port, Haifa. The $4.2 billion cargo facility at Haifa, owned by Adani Group, has been a target of Iranian missiles but has not suffered any damage. Last week, Jugeshinder “Robbie” Singh, CFO of the Adani, debunked misinformation posted that the port was on fire from a strike on Iranian social media.