Madhya Pradesh's Datia town, an official said. The incident took place at around 4 am in Khalkapura area.
The wall situated adjacent to a house fell over it, trapping nine persons under the debris.
Seven persons were killed and two others rescued, Datia Collector Sandeep Makin said.
Expressing grief over the incident, Madhya Pradesh Chief Minister Mohan Yadav announced an assistance of Rs 4 lakh each to the kin of the victims, the official said.
Senior officials reached the spot soon after the incident and launched the rescue operation.