Gurugram, Oct. 5 -- Gurugram police on Monday arrested a 22-year-old man for allegedly strangling a 75-year-old retired teacher who lived alone at her house in New Colony, police said.

The accused, identified as Suraj Gupta, a native of Samastipur district in Bihar who was presently living in Gurugram's Madanpuri area, was arrested near Laxmi Bazaar Park in Pratap Nagar, police said.

The victim, Madhu Sharma, had been living alone at her New Colony residence for several years and had retired as a teacher in Delhi.

According to police, a neighbour spotted a man standing outside Sharma's house at around 8.15 p.m. on Sunday before entering the premises.

Soon afterwards, he heard screams from inside and alerted his father, other residents a...