The Coast Guard Sector San Juan is working with local emergency services after a fuel barge ran aground on Monday near the entrance to San Juan Harbor, close to the San Felipe del Morro Castle.

The 265-foot barge Defiant was being towed from St. Thomas in the U.S. Virgin Islands when it grounded just outside the harbor near Old San Juan. It came to rest near the historic 16th-century fortress protecting the entrance to San Juan Bay.

The Coast Guard reported that there were no injuries or missing crew members, and there are currently no signs of pollution. Marine units are on site monitoring the barge and the surrounding waters.

Despite the grounding incident, the Port of San Juan is still open to vessel traffic. The Coast Guard stated that the barge is not blocking the navigable channel and has set up an Incident Management Team to manage the situation.

The Coast Guard is also sending out a Safety Marine Information Broadcast to warn nearby vessels. An investigation is underway to determine the cause of the grounding.

In a statement, the Coast Guard urged the public to stay clear of the area to allow response teams to work safely.

Authorities have not yet provided information on when salvage operations might start or how long the barge is expected to remain aground.