The ashes have settled over the charred Louisville neighborhood where nine people remain missing and families cling to hope as investigators comb through the wreckage of Tuesday’s fatal UPS cargo plane crash.

An investigation has been launched into the cause of the deadly Tuesday crash, which occurred as an MD-11 was taking off.

UPS said it is temporarily grounding part of its fleet of aircraft after a cargo plane crashed into a ball of flames shortly after taking off from Louisville Muhammad Ali International Airport in Kentucky earlier this week.

Former colleagues are mourning three pilots killed in the UPS cargo plane crash near the Louisville, Kentucky, airport, as relatives of a badly burned man who was pulled from the wreckage confirm he’s also among the 14 who died.