The government today said two persons have been arrested in connection with a grenade attack on a religious gathering in Punjab. In reply to a question in the Rajya Sabha, Minister of State for Home Affairs, Hansraj Gangaram Ahir said three persons are wanted for their role in the attack that took place in November last year near Amritsar. <br />''<br />''Three people were killed and over a dozen injured in the attack. Mr Ahir informed that Punjab Police and the National Investigation Agency are probing the case. <br />