The Coast Guard tested the tugboat captain, a barge crew member and the camp counselor for alcohol or drugs. None tested positive, the agency said.

On Tuesday, the sailboat involved in the fatal crash that killed two girls near Miami Beach was removed from the scene, along with the construction barge that collided with it. The U.S. Coast Guard confirmed Tuesday that alcohol and chemical testing had been completed and that results were pending.

Two children were killed and two more are in critical condition after a barge struck and sunk their boat, sending them overboard during a sailing camp in Miami on Monday, authorities said.