Police sources said that Rakesh Kumar, a resident of Mohammadabad village, is an addict, which was being opposed by her mother Sushila Devi.
"On Saturday night Rakesh reached his home in an inebriated state on which Sushila raised objections," they said.
Police sources said that Rakesh thrashed Sushila, injuring her seriously.
"Sushila was admitted to the hospital where she succumbed to her injuries on Sunday," they said.
Superintendent of Police (City) Sarvesh Kumar Mishra said that a case has been lodged and three teams have been constituted to arrest Rakesh.
(With UNI inputs)