Watch: US seizes oil tanker in Caribbean sea

The US Coast Guard boarded two "ghost fleet" tanker ships in a "meticulously coordinated" operation, Homeland Security Secretary Kristi Noem said.

Noem said one ship was in the North Atlantic Sea while the other was in international waters near the Caribbean. The operations took place within hours of each other, she adds.

The tankers, the Marinera and the Sophia—were "either last docked in Venezuela or en route to it", Noem said.