Three sisters Rajani Regmi, Liza Regmi and Monika Regmi and their friends Ashmita Thapa and Janak Raut, from Chitawan district had gone to Kurintar on holiday yesterday.
The incident occurred when they went to the river after their lunch at a resort at Kurintar, 100 km west of Kathmandu.
A police rescue team started searching for them as they didn't return home yesterday. They could not be located till today afternoon and are now feared dead, police said.