Fresh questions are being raised over the effectiveness of the US naval blockade in the Persian Gulf after vessel monitors claimed that at least two oil tankers breached the blockade perimeter. , one of the vessels identified as VINA/VALLEY allegedly entered the restricted zone despite ongoing US military operations in the strategically critical Strait of Hormuz. The tanker has previously been accused of transporting Iranian LPG shipments linked to Houthis forces in Yemen. A second and larger Iranian-linked tanker was also reportedly tracked entering the area. The development comes as Washington continues its pressure campaign against Iran and maintains a naval blockade around key Gulf waterways.