EDMONTON - RCMP say divers have not found any human remains in a pond being searched as part of an investigation into the mysterious disappearance of an Edmonton-area couple.

Sgt. Tim Taniguchi said police brought in a dive team Tuesday to ensure that a property west of the city is thoroughly scoured for clues.

"This is one of many searches we have conducted in this investigation. There is a body of water at this location. We are doing a comprehensive search that includes searching the water. It is just what good investigators do," he said.

Police also brought in a heavy truck to help in the search of the pond-like dugout, but would not release any information about the vehicle.

Media reports described the vehicle as an industrial vacuum truck.

Taniguchi said it is too early to say whether the divers have found anything that will help the investigation.

"I can't confirm or deny anything about any exhibits that have been seized."

Lyle and Marie McCann, both in their 70, were on their way to visit relatives in British Columbia when they were last seen on July 3.

Two days later, their motorhome was found burning near Edson, Alta.

Travis Edward Vader, 38, was arrested by RCMP in July on unrelated charges. Police have said he is a suspect in the McCann case, but he has not been charged in the couple's disappearance.