Venezuela's state oil company PDVSA has canceled several authorizations it had granted U.S.-based producer Chevron to load and export Venezuelan crude in April, three sources with knowledge of the decision said on Thursday.

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

Chevrons Venezuelan crude shipments have hit a roadblock as PDVSA, Venezuelas state oil company, revoked export authorizations for several tankers due to payment uncertainties linked to renewed U.S. sanctions.