The United States has decided to return a recently seized oil tanker to Venezuela, according to two unnamed U.S. officials who confirmed the decision on Wednesday, as reported by Reuters. The vessel, identified as MT Sophia, is a Panama-flagged supertanker. No official explanation has yet been provided for why the U.S. is returning the ship.

Over the past several months, the United States has conducted operations targeting oil tankers linked to Venezuela. Since late last year, at least seven such vessels have been seized. MT Sophia was captured on January 7 this year during a joint operation by the U.S. Coast Guard and military while it was carrying oil. At that time, U.S. authorities described it as a “stateless and sanctioned dark fleet tanker.” It remains unclear whether the tanker currently contains oil.

Neither the U.S. Coast Guard nor Venezuela’s communications ministry has issued any immediate comment regarding the decision or the vessel’s current status.