WBAP/KLIF – Two women and two children were killed Saturday night in a head-on collision near Argyle. One of the women and a child were killed outright when a vehicle southbound on US 377, also known as Fort Worth Drive, crossed over the centerline and slammed into a northbound vehicle. The woman and child who initially survived the wreck died in hospitals early Sunday morning. The cause of the collision has not been determined. Investigators say alcohol or speed did not appear to have been factors.