The Thai navy SEALs, who have been spearheading the rescue effort for the 12 boys and their soccer coach, have posted a photo on their Facebook page with a vow to bring the trapped team home from a flooded cave.

The unit says in a message: “We, the Thai team and the international team, will bring the Wild Boars home.” That’s the name of the young boys’ team.

The risky diving operation to bring them out has started and the first boy is expected to be out of the cave around 9 p.m. Sunday at the earliest. Rescuers say it may take 2-4 days for the entire team to reach safety, depending on conditions inside the cave.

The local governor in charge of the rescue says the mission was launched Sunday morning because floodwaters inside the cave are at their lowest level in days and rains forecast to hit the region risk flooding the cave again.