Sheriff's detectives are investigating the death of a person who is believed to have been left dead in an apartment for almost a month, said Cmdr. Dan Leper of the Kern County Sheriff's Office.

At about 3:30 p.m. Friday, deputies went to an apartment in the 1900 block of Quincy Street to check the welfare of a tenant who had not been seen since the beginning of November, Leper said. The landlord told deputies there was a foul odor and flies coming from the apartment.

When deputies went inside the apartment, they found a dead body, Leper said. They also found evidence that suggested there were suspicious circumstances surrounding the death. Leper said he could not elaborate on what that evidence was.

The body was "in a bad state of decomposition," Leper said. So, the victim has not been positively identified. Leper said the body appeared to be that of an adult, but said the age and the gender are still unknown.

On Friday night, sheriff's detectives were on the scene collecting evidence to figure out what happened, Leper said.