Salamo, Abdul Khaliq and Adil Thorsong were till recently in the custody of security agencies at Margo post in north of Ladakh after being detained on June 12 and were flown in a special helicopter from Burtse to be handed over to the local police.
The police will now proceed against them, official sources said.
The youth had earlier told their interrogators about their dreams to enter India and earn money as they were facing acute poverty in their region.
The youth, aged between 18 and 23, were arrested inside Indian territory on June 12 near Sultanchku.
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It was also not clear from where they had come as the nearest habitation across the Line of Actual Control (LAC) was in north of Karakoram range.
Authorities are working on the possibility that they could have entered through either Raki Nallah, Jeevan Nallah or north of Daulat Beig Oldie where Indian and Chinese troops had a face-off for nearly 21 days from April 15 to May 5.
Besides this, apprehension was being expressed that the three could have been heading towards Pakistan occupied Kashmir which is barely 30km up north of the area from where they were apprehended.
The three men were carrying a huge political map and two smaller versions of the document with Arabic and Yarkandi script on it.
They were also carrying improvised swords and knives, tinned food including egg powder (useful in higher region), Chinese currency of over 900 Yuan and Chinese leather jackets.