Yet another search for a missing Regina girl on a Saskatchewan reserve has ended unsuccessfully.

"The search managers and the search teams feel that they have covered the area as thoroughly as is possible," Regina police spokeswoman Elizabeth Popowich said late Friday of the latest hunt for Tamra Keepness.

She disappeared from her Regina home on July 5.

"When you look at the terrain, I don't know if anyone would ever be able to guarantee with certainty that they've covered every inch of the area that they wanted to, but I think they feel that they've done it as thoroughly as they can," Popowich said.

Police were searching the Muscowpetung reserve located northeast of Regina. They didn't say what prompted them to return there.

Besides climbing through the underbrush and ravines, some beaver ponds were drained and searched.

Popowich said each search has been done based on a combination of information and a feeling there was a reason to search a particular place.

"In each case, people went at it with a great deal of energy and optimism," she said. "Even though the searches to date haven't yielded any direct information as to Tamra's whereabouts, I know that search teams always say one of the benefits that come out of that is we know one place where she's not."

Another recent development in the case was the arrest last Tuesday of a man for the theft of a van from the neighborhood where Tamra vanished.

The van was taken about 10 blocks from the Keepness home in inner-city Regina the same night Tamra vanished. It was found, burned out, two weeks later on the Muscowpetung reserve.

Walter William Obey is to appear in court on Tuesday.

With files from The Canadian Press