Sahibabad police station SHO Rakesh Singh said the trio were arrested from Bhopura on Loni Road yesterday based on a tip-off.
They were identified as Waseem, Akram and Meharban.
The SHO said the trio told interrogators that after stealing motorcycles, they would change their registration numbers and sell them.
One country-made pistol with live cartridges and two knives were seized from them, the police officer said, adding that the trio have been sent to jail.
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