MINGORA: Militants beheaded a watchman at the offices of a cellular company in the Kalakot area of Matta, Swat, and hurled hand grenades at the house of a female dancer, in separate incidents on Wednesday.The militants beheaded watchman Zareen Gul, threw his body on a roadside, and fled brandishing their weapons. In the Bunter area of Mingora, the militants hurled grenades at the house of Shabana, a dancer and stage artist, partially damaging the house. Separately, security forces arrested four militants from the Charbagh, Madyan and Imam Dheri areas and took them to an undisclosed location for investigation. The security forces also released 53 suspects arrested during a military operation in Swat because of lack of evidence. The operation was carried out three months ago.