Some unidentified robbers had barged into Anjali's mother's house in Nistauli village in Sahibabad area at around 1.30 am and thrashed her brutally, before fleeing with booty, police said.
Robbers also inflicted injuries to her mother Mundresh, a widow, and sisters Preeti(18) and Antim(12) and brother sekhar (10), they said.
On hearing the screams of family members, the neighbours rushed to the spot and called up the police, an official said.
Sahibabad police station Inspector Upendra Yadav said the modus operandi of dacoits is much similar to that of 'Bavaria gang'. As per their prior history, the 'Bavaria gang' is active during rainy seasons.