TUNIS, Tunisia (AP) — An international activist group seeking to deliver aid to Gaza on a flotilla says one of its boats was hit by what it believes was a drone while docked in Tunisia. Tunisian authorities denied a drone was involved, and said they are investigating a fire in a life jacket aboard the boat.

The Global Sumud Flotilla stated that a vessel known as the 'Family Boat' and traveling under a Portuguese flag 'was struck by a drone,' but that no one aboard was hurt. Footage posted on the group’s social media showed a flash of light landing on one of the boats and setting off what appears to be a fire.

Scheduled to leave Tunisia on Wednesday, the flotilla is expected to hold a news conference in Tunis later Tuesday regarding the incident. Despite these events, the group emphasizes that they will continue with their mission to deliver aid to Gaza.

The flotilla is part of a broad movement dedicated to providing assistance to Gaza by boat. Meanwhile, the Tunisian Interior Ministry described the reports of a drone attack as unfounded and stated that specialized security units are probing the cause of the fire in the life jacket. The Israeli military and government have yet to respond to requests for comment.