Two suicide bombings on Friday morning killed at least 70 people outside a paramilitary force academy in Shabqadar, Charsadda district in Pakistan, police said.

The attack appeared to be the work of two suicide bombers and that the death toll could rise, Reuters reported quoting police sources.

The attack coming in less than a month after the US forces killed al-Qaeda leader Osama Bin Laden in the town of Abbottabad on 2 May was viewed as the retaliatory attack by the terrorist groups in the country. No group has claimed responsibility so far.

The blasts took place as the trainee cadets were boarding buses in front of the academy, police said. Many civilians were also killed in the attack and the injured were rushed to a local hospital, sources said.

Shabqadar, a border town 35 kilometers (22 miles) from Peshawar, has been sealed by the security forces after the attacks.