"The Dibrani (family) were walking in Mitrovica with their children when they were attacked by unknown" people, a police officer, who requested to remain anonymous, told AFP.
The mother of 15-year-old Leonarda, Xhemaili, was "beaten and is in hospital while the children, who are traumatised, are at a police station," the officer said.
Leonarda's father Resat Dibrani, 47, was at the hospital by his wife's side.
"It shows that the Dibranis are not safe here," the officer said.
Hollande's offer was immediately rejected by the girl while her father said that the family, deported on October 9, would not be divided and would return to France by any means.
Leonarda Dibrani's eviction caused an outcry in France because she was detained during a school trip before being deported with her family, and students took to the streets demanding she return and Interior Minister Manuel Valls resign.