Original sentence: According to the official estimate presented by the Indian government, 1592 were apprehended and there were 492 civilian casualties.Chand Joshi has suggested about 5000 casualties.though numbers put forward by independent human rights organizations are significantly higher
Edited sentence: According to the official estimate presented by the Indian government, 1592 persons  were apprehended, though numbers put forward by independent human rights organizations are significantly higher.Chand Joshi has suggested about 5000 victims