GROVE, Okla. (AP) - Oklahoma police say a Delaware County woman and her grandson from Missouri both have died as the result of an all-terrain vehicle accident.

A report from a state trooper said the two were killed about 9 a.m. Sunday when the ATV the woman was driving, with her grandson as passenger, veered off a county road near Grove, in the northeast corner of the state, and then rolled over atop them.

The report identified those killed as 49-year-old Tonya Cochran and her 4-year-old grandson, Wesley Cochran Jr. of Gladstone, Mo.

According to the trooper's report, the woman and her grandson were both ejected from atop the ATV and thrown about eight feet, landing on steps to a house. The report said the four-wheeler then landed on both subjects.