Authorities said the three men and one woman, who were Chinese citizens, were “executed” on the 10-acre property west of Hennessey, about 90km northwest of Oklahoma City. A fifth victim, who is also a Chinese citizen, was wounded and taken to an Oklahoma City hospital.
Next-of-kin notification was still pending “because of a significant language barrier,” police said.
Authorities have a suspect in mind, but the Oklahoma State Bureau of Investigation (OSBI) is withholding the name for now to avoid endangering others.
“The suspect was inside that building for a significant amount of time before the executions began,” OSBI said in a news release on Tuesday.
“Based on the investigation thus far, this does not appear to be a random incident.”