Their numbers far surpass all humans on earth. Some used to say they are from a certain country or region on earth yet his is not the case.

"so where are they and how do they reproduce?"

The day we gather them all, Oh nation of Jin, you have reproduced from the humans, and their allies from humans said: Our lord we have enjoyed one another and we have reached our time that you have appointed for us. He said: The fire is your residence forever until God decides. Your Lord is All wise and knowledgeable. Quran 6:128‍

The reproduction between male Humans and female Jin is what lead to offsprings that are hybrids. they reside under the earth and sometimes come to the surface. Is this in line with ALIEN ABDUCTION (level 4) and reproduction between aliens and humans producing offsprings. in line with the ayah: They call (leaving God), female deities: They call but upon satan the persistent rebel! Allah did curse him, but he said: "I will take of Thy servants a portion Marked off; Quran 4:117-118

These offsprings do not look human at all, some call them GREY ALIENS and have been spotted in several locations on earth, they are a misformed creation in line with the ayah: "I will mislead them, and I will create in them false desires; I will order them to slit the ears of cattle, and to misform/deface the (fair) nature created by Allah." Whoever, forsaking Allah, takes satan for a friend, hath of a surety suffered a loss that is manifest. Quran 4:119

These beings look like humans but they are different because of the female Jin (Alien) genes in their bodies, they will be part of the army that will build the country of Israel. The false messiah will deceive the world in making them believe these beings are angelic in nature and came to save the earth. These beings reside inside hollow earth from the North, they can not enter the Southern part of Hollow Earth since it is blocked by the barrier of ZulQarnein which stops them from going there in line with the ayah: Thus were they made powerless to scale it or to dig through it. Quran 18:97

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