A 14-year-old American boy who walked away from the Caribbean Princess cruise ship after its scheduled stop at a German port more than three days ago has been found safe, his grandmother said Saturday.

Aydin Brown had been on the cruise with his grandmother, but left the ship after it docked at Rostock-Warnemünde on Thursday morning, authorities said.

State and local police on Saturday distributed three new photos of the teenager as their regional search remained…