The closure was due to the uncontrolled roadway about half way along, several vehicles crossed with the lights to red, meaning the crossing was closed and aircraft were using the runway. Supposedly vehicle came very close to a crash with a helicopter, so they decided to close the entire runway to takeoffs and landings, allowing only taxiing.
Also this now frees up block 33 for parking at all times, this maybe something to do with it as well.
Others may have a better idea.
atomicflight