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Police are investigating the deaths of two people found Friday morning at the E-Z 8 Motel at 5555 Cedar Court in Newark.

NEWARK -- A 17-year-old Pleasanton girl reported as a runaway Monday was found dead with a man inside a Newark motel on Friday in what police say looks like either a murder-suicide or a double suicide.

Officers responded to the E-Z 8 Motel at 5555 Cedar Court at 11:48 a.m. Friday after a housekeeper discovered the bodies in a second-floor room above the motel office, Cmdr. Mike Carroll said.

Both were pronounced dead at the scene, Newark police said in a statement. The cause of death is still under investigation, but a preliminary investigation points to a murder-suicide or "a tragic double suicide," the statement said.

Pleasanton police issued a news release late Friday saying the female victim was a teenager reported as a runaway by her mother on Monday. The 24-year-old man was from Livermore, Newark police said, referring to a statement from the Alameda County coroner.

Police would not confirm if the girl was Patricia Martin, a Village High student who was reported missing Monday and was listed as an "endangered runaway" on the National Center for Missing and Exploited Children website.

Police said the mother was unable to provide any information regarding her daughter's whereabouts but believed she was in the company of her boyfriend.

Anyone with information about the incident can contact Newark Police Detective Elsa Cervantes at 510-578-4738 or the investigations unit at 510-578-4247. Information can also be left anonymously on the "silent witness" hotline at 510-578-4965. They also can contact Pleasanton police at 925-931-5100.

Staff writers Katie Nelson, Erin Ivie and Kristin J. Bender contributed to this report. Contact Natalie Neysa Alund at 510-293-2469. Follow her at Twitter.com/nataliealund.