In a video shot by the Afghan security forces, the unidentified cadre revealed that he crossed over into Mohmand Dara area in Afghstan's Nangarhar province along with elements of the Taliban.
He said, "I have infiltrated into Afghstan for the first time. I was given training for four months and reached here 10 days ago."
It was a big operation wherein 10 JeM cadres, 5 Afghan Taliban and 4 Afghan Army personnel were killed.
On the intervening night of April 13-14, a big group of JeM cadres was intercepted by the Afghan security forces while trying to cross over into Nangarhar province.
Several JeM cadres were killed and a large consignment of arms and ammunition, as well as parts of a bomb, was recovered.
This included mortar launchers, RPGs and Russian sniper rifles.
On several occasions, Kabul has blamed Pakistan's intelligence agency, the ISI, for basing terrorist camps within Pakist territory to target Afghstan.
( With inputs from ANI )