SABATTUS — Divers, hampered by poor visibility in murky water, resumed the search Wednesday for the body of a Massachusetts man who disappeared in Sabattus Pond during a boating accident a day earlier.

Working in shifts, eight divers from the Androscoggin County Sheriff’s Department and Maine Warden Service searched for Andrew J. Duffy, 35, of Beverly.

Duffy, who authorities said owned a camp on the lake, worked as the business administrator for Peabody schools.

Duffy was driving a boat with two adult passengers and three children when one of the children, a 9-year-old boy, fell from an inner tube being towed by the boat.

Duffy and the other two adults, Christine Young, 40, and Connie Krinsky, 35, of Greenville, N.Y., dove into the lake to help the boy, said Sabattus Police Chief Bryan Lamoreau.

Duffy brought the boy to the surface and was able to get near the boat, but then slipped under the water, Lamoreau said. The boy was wearing a life preserver, but the adults were not.

Divers searched for Duffy for nearly five hours Tuesday afternoon. The search resumed Wednesday, but visibility was less than a foot because of thick algae growth in the southern Maine lake, said Paul Fournier, spokesman for the Inland Fisheries and Wildlife Department.