The incident took place yesterday in Badlapur area when Gita Devi, 38 jumped in front of a train with her daughters, Khushi, 14 and Khushbu, 5 and Kusum, 3, they said.
After undergoing imprisonment of 14 years in Pakistan, both of them returned to India in 1999 and a case of sedition and waging war against nation was registered against them.
A 25-year-old man Gurtej Singh, a farmer of village Bhuttiwala here shot himself with a revolver on Friday, while recording the incident live on Facebook.
Based on the complaint of family members, Malkajgiri police registered a case of abetment of suicide against the school officials.
Ankit Saxena, had been dating the 20-year-old woman for the past three years, against the wishes of her family.
Sikh groups had maintained that members of the community used to face problems abroad as their certificates were issued under the Hindu Marriage Act.