Facilitators of last year’s suicide attack on the Federal Constabulary (FC) Headquarters in Peshawar were based in Afghanistan, investigators said on Sunday.

In a key development in investigations into the case, authorities said the attack was planned from across the border, and several key arrests have been made in connection with the incident.

The suicide bombing, which occurred on November 24 last year, claimed the lives of three FC personnel and injured five others.

Eight civilians were also wounded in the attack.

According to authorities, the entire planning of the attacks was made in Afghanistan.