Distributing the inheritance among people who died in the same accident

Q: `Abdul-Rahman ibn Sa`dan, his wife and his children died in (Part No. 16; Page No. 542) a car accident. It was not possible to know who died first. Do they inherit each other?

A: If the matter is as mentioned; that they all died at the same time and it was impossible to know who died first, no one will inherit the other because one of the conditions of inheritance is that the testator is died and the heir is living. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.