At least two vessels carrying Venezuelan crude chartered by Chevron are stalled due to state oil company PDVSA canceling their export authorizations, according to shipping data and sources, as the government had no certainty of payment amid the hardening of U.

This development comes after Washington cancelled key licences last month for several PDVSA partners including Chevron.

Venezuelan state-owned PDVSA has revoked authorizations for U.S. supermajor Chevron to load and export crude oil, following the Trump Administration's increased sanctions and tariffs on Venezuelan oil exports and buyers.