Islamabad: As Pakistan's border with Afghanistan at Torkham and Chaman checkposts remains closed, authorities have issued shoot-at-sight orders for illegal entries into the country.

The 'Friendship Gate' at Chaman was closed on Friday night due to security concerns in the wake of the suicide attack on the shrine of Lal Shahbaz Qalandar in Sehwan town of Sindh province in which nearly 90 persons were killed and over 200 injured.