The cause was not immediately known, but authorities have previously warned 30-40,000 buildings erected without approval in Nairobi are at risk of collapse.
Unable to bear the weight of the people, the parapet wall collapsed on those who were standing underneath it.
Vipin (25), Rajan Kumar (20), Kundan (18) and Vikas (18) have been admitted to a hospital, a Delhi Fire Service official said.
The incident occurred at a helipad in Gilgit-Baltistan where an event under the supervision of the Pakistan Army was underway.
The incident took place in the wee hours in Patehari village under Jigna police station area.
The deceased Kishori Lal, retired Army personnel, was working as a guard at the medical college and was employed by a private company.
Owing to incessant rain the wall got extremely and fell on the children who were playing near the place.
Mumbai and its adjoining areas are likely to receive heavy rains in the next two days, the India Meteorological Department (IMD) forecast said on Tuesday.
The state government had announced a compensation of Rs 5 lakh to the kin of the deceased and had also asked the BMC to give an equal amount.
The victims were identified as Rinchin Lhamu and Genden Wangmu, both aged ten years. Another girl, Sange Pema (12), was seriously injured and she was admitted to the District Hospital in Tawang.
A portion of the wall that was under the repair, collapsed after heavy rains lashed the city for more than three hours on Tuesday.
Maharashtra Chief Minister Devendra Fadnavis and Minister of State for Urban Development Yogesh Sagar have visited Shatabdi Hospital to meet the injured.
Malad and Chandivali are areas where hill slopes have encroached and most of the encroachments have been regularised for a long time.
The body of the girl, Sanchita Ganore, was brought out of the debris in the afternoon, almost 12 hours after she was trapped beneath it.
The compound wall of the Sinhagad College campus in Pune's Ambegaon crumbled around 1:15 am today after incessant rains, killing six workers and injuring three others.