India News: The prime suspect in the attack on Friday on Indian prisoner Sarabjit Singh had quarrelled with him a few days ago but Pakistani authorities at Kot Lakhpat Jail did not bother to take notice of the incident, official sources said on Friday.

Death row prisoner Amer Aftab tried to attack Sarabjit a few days ago and abused him, the sources told PTI.The reason for the altercation could not immediately be ascertained.