India, Aug. 16 -- A 29-year-old man was arrested on Thursday for allegedly killing his girlfriend's four-year-old son over suspicion that she had met her husband, police said on Friday.

According to police, the accused is Neeraj Kumar, a resident of Sanjay Enclave in Faridabad and a building material supplier. Kumar's 32-year-old girlfriend was separated from her husband and has three daughters and a son. While the daughters live with the husband, the woman and her son have been living with Kumar for a year.

Police said she had left the house with her son three days ago after a fight with Kumar and returned on Wednesday night. On coming back, when she asked Kumar for money to pay the auto rickshaw driver, he started beating her.

Yashpa...