A seven-month-old girl was battered to death, allegedly by her mother, in Rohini district’s Begumpur area. Police said the woman has been arrested on charges of murder. Preliminary investigation has revealed that the couple got married five years ago and had their first child in August last year. According to police the husband allegedly began to doubt if the child was indeed his, leading to frequent fights between the couple. The incident took place on Saturday at 10.30 am after the woman’s husband left for work.