India ? The lone surviving gunman in the Mumbai attacks made a surprise confession at his trial Monday, saying he was recruited by a militant group inside Pakistan after he left a low-paying job and went looking for training to become a professional robber.

The confession by Ajmal Kasab bolstered India’s charges that terrorist groups in neighboring Pakistan were behind the well-planned attack, and that it is not doing enough to clamp down on them. The attack in which 166 people died severely strained relations and put the brakes on a peace process between the nuclear-armed enemies.

As part of the confession, Kasab described how he sprayed automatic gunfire at commuters while a comrade hurled grenades inside a railway station during one of India’s worst terrorist acts.