Updated

Authorities in Tulsa say four people are dead following a shooting at a residence.

Police said Sunday that a shooting involving multiple victims was reported about 7 p.m. Saturday.

The Tulsa World reports (http://bit.ly/1dtMdLK ) that officers who arrived on the scene found two people dead, a man and a woman both between 30 and 40 years old.

Kelli Bruer, spokeswoman for the Emergency Medical Services Authority, says a second woman, who appeared to be in her 50s, was pronounced dead at a hospital.

The fourth homicide victim is believed to be a woman in her 50s. A 55-year-old man was hospitalized in serious condition.

Police say the victims were shot by a lone gunman at close range. Investigators say they are searching for a suspect.

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Information from: Tulsa World, http://www.tulsaworld.com