The United States has seized a Russian-flagged oil tanker in the North Atlantic following a dramatic weekslong chase on the high seas.

The Russian Foreign Ministry said on Friday that the United States had released two Russian crew members from a Russian-flagged oil tanker seized on Wednesday in the Atlantic Ocean.

A weeks-long chase across the Atlantic ended on Wednesday morning when the U.S. Coast Guard and U.S. military special forces, bearing a judicial seizure warrant, apprehended the Marinera crude oil tan...