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LOS ANGELES (CNS) - Two people were behind bars Monday in connection with the killing of a UCLA student whose body was found after a fire at a Westwood apartment, Los Angeles police announced.

Alberto Medina, 22, was arrested Saturday in Fresno, and 22-year-old Eric Marquez was taken into custody Sunday near his apartment in Westwood, according to the Los Angeles Police Department.

Medina and Marquez were linked to Andrea DelVesco's death through forensic evidence collected at the scene of the Sept. 21 fire in the 10900 block of Roebling Street and witness statements, police said.

Both men were booked at the Van Nuys Jail on suspicion of murder. Medina was being held without bail and Marquez in lieu of $1 million bail, according to the LAPD.

According to UCLA, Marquez is a fifth-year undergraduate student at the university, majoring in biology. Medina is unaffiliated with the university, according to UCLA.

DelVesco, who was from Austin, Texas, and was entering her fourth year at UCLA studying psychology and Spanish, was facing drug-related charges at the time of her death.

On July 8, she was arraigned on charges of possessing the drugs Ecstasy, LSD, methamphetamine and Psilocybin, and pleaded not guilty. DelVesco had remained free on her own recognizance, and had been tentatively scheduled to appear in court next week, according the Superior Court's website.

Neither police nor the county coroner's office has disclosed how DelVesco was killed.

DelVesco was a member of the Phi Beta Phi sorority.