About 50 armed naxalites reached the site of the tower situated on Aurangabad-Medininagar route in the district, stuffed explosives before blowing it up, Deputy Superintendent of Police Brajmohan Paswan, said in Medininagar.
The blast left a big crater on the spot, about 200 km from Ranchi, he added.
The CPI (Maoist) is observing a two-day shut down in Jharkhand, Orissa, West Bengal [ Images ], Bihar and Chhattisgarh against the arrest of two of its senior members.
Maoists blow up tracks in Latehar
Meanwhile, the Maoists on Monday also blew up a stretch of railway track in Latehar as they began their 48-hour bandh in five states, including Jharkhand.
About 20 left-wing ultras blasted the tracks between Kumundi and Hehegarha railway stations, about 150 km from Ranchi, according to Latehar Railway station master P N Tiwari.
The blast occurred on the down line disrupting the Barwadih-Barkakana route, he said.