Custody of baby after mother passes away a week after birth

As-salaam-u-alaikum w.w.

Scenario: Woman delivers a baby boy and then dies a week later.
Query: What are the rules/regulations/stipulations regarding custody and upbringing of the baby? Do the maternal grandparents (Nana, Nani) have any rights over the child?

Jazakallah

Wasalaam

Grenada