Investigators say little is still known regarding the death of a San Francisco woman found slain at the side of a remote East Bay road Tuesday, the first homicide in the area since 2008.

The Chron reports that the body of a deceased woman was discovered around 3:50 p.m. on Tuesday in the 500 block of Camino Diablo, a rural area of unincorporated Contra Costa County near Byron.

The property on which she was found is the location of a sand mine, CBS 5 reports. It was an employee of the mine who made the gruesome discovery, "in a desolate area" with "no surveillance cameras and few people around to witness a body being dumped."

According to KRON 4, "her death is not believed to be a mining accident," but not much else has been revealed: CBS 5 reports that Contra Costa County Sheriff's Office Director of Public Affairs Jimmy Lee declined to "elaborate on how she was killed or what condition her body was in."

“What I can tell you is she is an adult female in her 40s and from San Francisco,” Lee said. “Yeah, we do know who she is, we’re not able to release the identity at this time.”

An autopsy was Wednesday, as well as a toxicology test. As of publication time details from it had been withheld, with Lee saying “I don’t think our investigators want to go into that level of detail."

Lee noted that this was the first reported homicide in the area since 2008, and said that “There’s still a lot of unanswered questions here. We don’t know what the motive is."

Anyone with information on the case is asked to contact the Contra Costa Sheriff's Investigation Division at (925) 313-2600. Callers to (866) 846-3592 can leave police an anonymous voice message, and tips can also be emailed to [email protected].