The Oklahoma State Bureau of Investigation hopes a 911 call will lead to help in solving the mysterious killings of two girls last month in eastern Oklahoma.

OSBI spokeswoman Jessica Brown played an emotional 911 tape Monday in hopes of generating more leads in the case.

The tape was of a 911 call made by the grandmother of one of the girls. The grandmother could be heard screaming that the girls were dead and telling a dispatcher the bodies were on County Line Road outside of Weleetka.

The bullet-riddled bodies of 11-year-old Skyla Whitaker and 13-year-old Taylor Placker were discovered June 8 on a gravel road less than a half-mile from the house where they were staying.

Authorities say they have no suspect or motive in the killings.