The reward for finding a missing St. Albert couple is growing.

On Monday, the McCann family outlined details of a special fundraiser to create a reward for anyone with a tip that leads them to Lyle and Marie McCann.

The fund began with an anonymous $10,000 donation. Since then, two more parties have come forward, interested in donating $10,000 each.

The new reward is in addition to the $2,000 reward being offered by Crime Stoppers for tips leading to the whereabouts of the McCanns.

The RCMP supports the special reward project, said Sgt. Tim Taniguchi. "It may assist in getting relevant and reliable information leading to resolution to the case."

The McCanns haven't been seen or heard from since they left their home for a vacation in B.C. on July 3. Surveillance video taken that day captures Lyle, 78, gassing up the couple's motor home at a St. Albert gas bar. Their burnt-out RV was located a week later at the Minnow Lake campground, near Edson. The SUV they were towing was found a few days later partially hidden in the bush near Carrot Creek, about 40 kilometres away from the campground.

Travis Vader has been identified by RCMP as a person of interest in the case. He is in police custody on unrelated charges.

Donations to the reward fund can be made at any TD Canada Trust location. The trust fund is under the name "Bret McCann In Trust".