The report has not been written in the best English, but from my understanding the SW737 was returning to the airfield with a fuel overheat warning light.
The Citation departed ahead of the inbound 737 & then got into difficulty itself, (cause unknown), neccessitating a return to the field.
The Citation made it's approach, again ahead of the inbound 737, but the pilot lost control & the a/c crashed into the runway.
The 737 was then diverted to Houston Intercontinental, where it made a safe arrival.
Condolences to the families of those involved.