Updated

New Hampshire authorities say there are ongoing diving operations in the town of Hinsdale near a Connecticut River dam as part of their missing person's investigation into the 2001 disappearance of a mother and daughter.

Tina Sinclair of Chesterfield was 34 when she disappeared Feb. 3, 2001; her daughter was 15. Authorities searched the home of Tina Sinclair's boyfriend, where she was last seen. Eugene Bowman told police he left the house one night after arguing with Sinclair. When returned, mother and daughter were gone.

No arrests have been made in connection with their disappearance.

The attorney general's office says the searches conducted on land and in the area of Vernon Dam aren't because of any new leads. New techniques have made it possible to search areas not previously accessible.