Police have expanded the search for a Masterton-based police dog lost in the Mt Holdsworth area.
Thames, a 3-year-old sable-coloured German Shepherd, disappeared on Sunday afternoon in the Totara Creek/Red Creek area during a day-long Search and Rescue exercise.
Officer in charge of the Wellington police dog section, Senior Sergeant Mark Davidson, said the search had been widened to include the farms around the base of Mt Holdsworth, with police teams supported by a helicopter and volunteers.
A dog-walking group was also patrolling rural roads in the area, hoping to spot the missing dog.
"Searchers, including his handler, are combing tracks and gullies, and calling out for Thames. We're hopeful he's making his way out."