In the Bab el-Mandeb, only one commodity vessel, a Bahamas-flagged dry bulk carrier, crossed the strait on Wednesday, Kpler data showed, down from 20 the previous day.
Yemen’s Iran-aligned Houthis said on Wednesday they had launched a missile attack on a Saudi oil tanker off the coast of the kingdom’s Red Sea port city of Yanbu and another missile attack on a Saudi oil tanker in the Gulf of Aden.
There was no confirmation from Saudi Arabia on either incident.
The Houthis have imposed a naval blockade on Saudi Arabia in the Red Sea since last month in response to what they described as a Saudi siege on Yemen, an allegation Riyadh has denied.
(Reporting by Mohi Narayan; Editing by Lincoln Feast.)