I flew in and out of Khartoum regularly in the late 70's/early 80's and the standards of firefighting/rescue kit was abysmal then and that was when BA (VC-10), Air France (707) and Lufthansa (727) were operating weekly services to the strip.
On start up you were lucky if a 'fireman' stood by with an extinguisher but even then you knew it was empty.
I doubt these poor souls stood a chance when you consider the decades of neglect Sudan has suffered since.