Mardan: Unknown robbers entered the house in broad daylight in Al-Muslam Colony on Canal Road within the limits of City Police Station and robbed the local businessman, sources said. Sources added that unknown robbers knocked on the door of the house of Haider Gul flour dealer. Sources added that when the local businessman opened the door. Unknown robbers entered the house and hostage Haider Gul along with his family members. Sources added thar robbers took away 18 lakh rupees cash. However, police has not registered FIR till filling this report.