Four people, including two children, are in critical condition after an accident near Loop 202 and Lower Buckeye Road Tuesday.
Firefighters say a family was involved in a rollover accident.
A bystander picked up the family and drove them to a gas station near 43rd Avenue and Thomas Road.
Southbound lanes of Loop 202 are closed.
There is no estimated time of reopening.
It is unclear what caused the crash.
The investigation is still ongoing.