Missing mum Nicola Bulley may have fallen into a river while trying to retrieve her dog's ball before getting weighed down by her clothes, police say.
The 45-year-old had dropped her two young daughters at school in St Michaels on Wyre last Friday morning before taking springer spaniel Willow out onto a nearby towpath.
The dog was later found running around alone, with her harness and lead on the floor, while Nicola's phone was on a bench still connected to a work conference call.