KINGMAN, Ariz. (AP) Authorities say a van that collided with a Dallas Cowboys staff bus at an Arizona highway intersection failed to yield the right of way at a stop sign.

The Arizona Department of Public Safety says the van's four occupants who were all killed in the Sunday afternoon collision on U.S. 93 north of Kingman were Chinese nationals.

The department says the van's driver was a 52-year-old man and that the passengers included two 52-year-old women and a 19-year-old woman.

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Identities weren't released while notification of next of kin is pending, and it's not known if the victims were related.

Nobody on the Cowboys bus was injured. The bus was headed to a pre-seasonal promotional stop in Las Vegas. No players were among the Cowboys personnel on the bus.