India, Feb. 6 -- A 25-year-old man was arrested for allegedly killing his 55-year-old mother over serving lunch late in Greater Noida, Jewar on Wednesday, police said on Thursday.

The accused, a resident of a Deorar village in Jewar, was mentally challenged and undergoing treatment at a hospital in Agra for the past five to six years. His mother got him released around a fortnight back.

"On Wednesday, the accused hit his mother's head from behind with a big iron bowl. His father, a farmer, was out on work at the time of the incident," said Sanjay Kumar Singh, station house officer (SHO), Jewar.

The SHO added, "The incident took place in the courtyard of their home. Locals rushed to the spot after hearing the mother cry and called the f...