Ghaziabad, Jan. 31 -- A father-son duo was arrested on Friday for allegedly assaulting and dragging on the road a constable from the Central Bureau of Investigation (CBI) in full public view on Thursday, when he visited as he visited their home in Jawahar Nagar, Loni, to hand over court summons.

The constable was held by his collar and dragged for about 300 metres before reaching a local police post, officers said.

Police identified the suspects as Laxman Prasad, 67, and his son Deepak Kumar, 35.

Veeri Singh, the aggrieved constable, in the FIR said that he reached their house around 4.30pm and called them and gave them details of the summons over phone.

"Upon this, Kumar dared me to ring the doorbell. When I did and gave my introduct...