U.S. forces have boarded a Venezuela-linked sanctioned oil tanker in the North Atlantic after pursuing it for weeks, a U.S. official said.

The official spoke to The Associated Press on Wednesday on the condition of anonymity to discuss sensitive military operations. The official said the U.S. military sized the vessel and handed over control to law enforcement officials.

The U.S. had been pursuing the tanker since last month after it tried to evade a U.S. blockade on sanctioned oil vessels around Venezuela.