The incident took place yesterday evening when Arun Chaturvedi, who edits a Hindi weekly, objected to dumping of waste on roadside.
He was attacked with spade and iron rod allegedly by dairy farm owner Madan and his four brothers.
He was rushed to the district hospital in an unconscious state. Later, he was referred to S N Medical College in Agra, police said.
"The assailants would not be spared for taking law in their hand. They have been booked under sections 307 ,147 and 148 of the IPC. They would be arrested shortly," SSP Rakesh Singh said.
Hafiz Sayeedudin filed a complaint with police that some neighbours attacked his family this afternoon, pelted stones at their house and open fired too.
An investigation was on into the case, police said, adding that efforts were on to nab the accused.