Kamal Mohan, aged 22 years, and Mohan Khaldak (18) drowned in Indus river while washing their clothes near Varsodo-Achinathang area in Ladakah's region Leh district.
Both were residents of Nepal, they said.
Two youths were feared drowned in fast-flowing Suru river in Kargil district, the officials said.
Mohammad Qasim and Ghulam Abbas accidentally fell into the river and were washed away by the swift current of the water.
Search operations were launched but there was no trace of the two youths, officials said adding they were presumed dead.
Nine-year-old Mohammad Umar Malik drowned while taking a bath in Vaishnoo stream in Bijbehara town in Anantnag.
The body was fished out and handed over to relatives, the officials said.