Robbers looted valuables from four houses in Razfulbaria area in Savar town and violated a housewife early Sunday.
The victim's family members said a gang of robbers numbering 15/16 stormed in the house of Mahinur Islam where four families live.
The robbers tied up the men of the families with rope at gunpoint around 4 am, they said.
Later, the gang looted cash worth Tk 50,000, handful of gold, three auto-rickshaws, television sets and mobile phone sets.
Being obstructed, the robbers allegedly violated a housewife and tried to violate a garment worker as well, UNB reported.
Besides, eight people were injured in the attack.
On information, police visited the spot, said Mohsinul Kadir, officer-in-charge of Savar Model Police Station.