He said about 300 to 400 of Shivakumar's supporters came to his house recently, threatened him and later dug up a six-feet by eight-feet trench around the house.
Ramanagaram superintendent of police Anupam Agarwal said the deputy superintendent of police has submitted a report on the case after investigating the matter and he has dispatched it to the district deputy commissioner.
The report also states that the land belongs to Shivakumar and Prakash had encroached upon it, he said.
"Now Shivakumar wants to build a compound and hence he has dug up the trench around the house," he said.
Former minister and JDS leader PGR Sindhia alleged that the digging of the trench around Praksh house smacked of political vendetta.
Shivakumar said the land where the trench was dug belonged to him and his family and accused Sindhia of trying to damage his image.