The deceased have been identified as Hari Bahadur Thapa, 35, of Okhaldhunga and Nara Bahadur Sarki,50, and his daughter Rita Sarki, 18, of Kyanam VDC of the district.
According to Sindhuli police, a total of 11 people were travelling on the jeep when the accident occurred.
Among the injured, four are said to be in serious condition. They are identified as Ashis Shrestha (jeep driver) of Sindhupalchowk, Binod Karki and Deepak Shrestha of the Okhaldhunga and Ram Chandra Rai of Khotang.
The injured who sustained minor injuries in accident are Yam Bahadur Sunuwear, Tok Bahdur Shrestha Rabi Karki and Nanda kumari Rajbhandary of Okaldhunga district.
The injured have been taken to Dhulaikhel and Kathmandu for the treatment.
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