TRACON Controller reported two aircraft were low on fuel and there was no communication between the other ATC sectors about the aircraft. The controller provided assistance and both aircraft landed safely.

Narrative

While working ZZZ with limited airspace available due to multiple Restricted Areas/ALTRVs in sector; I had a handful of traffic including VFR flight following; multiple IFR ZZZ1 practice approaches; [and] IFR inbounds to ZZZ2 when I received a call from both Aircraft X and Aircraft Y on the frequency. Both Aircraft X and Aircraft Y checked in as '[priority handling] aircraft' descending from FL400 'bingo fuel' from the Warning Areas well above and east of my airspace. I asked them to IDENT - then; I contacted ZZZ3 to ask if they had any prior comms with Aircraft X or Aircraft Y; which they responded negative. I then contacted the ZZZ4 sector of ZZZ5 to ask if they had any information on the traffic; to which they responded they had taken a point out from ZZZ3 on both.My supervisor; not certified on the position I was working; nor the position between where I was working and the airspace these aircraft were coming from; sat down next to me to monitor the situation but had to ask the sector beside me to coordinate for me because they were unequipped to complete the coordination. The supervisor was only there to write down the information: SOB (Souls on Board); fuel remaining. I continued to work the traffic in my airspace; including breaking one aircraft off a cleared approach due to the inbound [priority handling] aircraft. I was able to radar identify the first aircraft because they were squawking 7700 and IDENT-ing when instructed. I had to instruct the other aircraft to squawk 7700 so I could positively radar identify them as both were still well above and outside my airspace; outside my STARS filter limits. Both aircraft were pointed out to the adjacent ZZZ6 Approach sector; vectored to ZZZ1 for the visual approach Runway XX. Both aircraft were safe on deck shortly after. To my knowledge I did everything in my power to complete all coordination; provide positive control; and handle the unexpected and rapid event in accordance with 7110.65. It was as if all sectors between where the aircraft departed and myself 'passed the buck' on any coordination about these aircraft. Warning Area airspace is still controlled airspace and at the time of this event; the airspace was owned by ZZZ3. ZZZ3 cannot keep critical information to themselves in events like these.