Pakistan has detained militants in connection with the Pulwama attack, which sparked the recent crisis with India.
They include the son and brother of Masood Azhar, founder of the group behind the attack, Jaish-e-Mohammad.
Pakistan said 44 suspected militants are in "preventative detention".
The move comes following a tumultuous month between the two neighbouring countries, which began on 14 February when a suicide bomber killed more than 40 Indian soldiers in the disputed region of Kashmir.
India retaliated by carrying out air strikes on what it said was a JeM militant camp in Pakistan. However, new satellite images have raised questions over India's claim to have demolished the camps.
Pakistan - which denies any involvement in the 14 February attack - said it had no choice but to respond and the day after the strike, a dogfight between the sides led to an Indian fighter jet being shot down and a pilot captured. He has since been released.