At least 11 security personnel, including an officer, were martyred in Swat's tehsil Kabal on Saturday evening when a suicide attacker targetted an Army unit, said the Inter-Services Public Relations (ISPR).
Those martyred include seven personnel who were critically injured in the attack. The attack on the Army unit also injured 13 other security personnel.
The Army's media wing added that the attacker targetted the sports area of the armed forces' unit.
The explosion took place in the Shareefabad area of the tehsil. A large contingent of security personnel secured the area after the attack and started an initial investigation into the blast.
Government sources said rescue teams reached the area and shifted the injured to a hospital in Saidu Sharif.
Earlier in December, security forces conducted an intelligence-based operation in Swat's Jahan Abad area and killed two wanted terrorists.
The operation was conducted after intelligence agencies received accurate information regarding movement of terrorists, who were crossing over from Afghanistan and entering Swat valley.
