At least five people were killed Friday in an apparent shooting spree involving a nursing home near Corpus Christi, authorities say. Three of the victims, two men and one woman, were found dead at the Retama Manor Nursing Center, according to the Robstown Police Department. Two others were later found dead at a home linked to the nursing home shooting. Robstown City Secretary Herman Rodriguez announced on Twitter that the suspected gunman was also dead. The victims have not yet been identified and investigators are still working to determine a motive. “Current information will remain scarce because we are looking at a murder investigation and not compromising anything that might impede that investigation,” Chief Erasmo Flores of the Robstown Police Department said in a statement released late Friday.