Hariprasad (45) of Andgau village, Neeraj (7) of Daulatpur village and six-year-old daughter of Durgesh Sharma of Diyanatnagar village died in the past 24 hours in Barabanki, a report reaching here said.
Hariprasad caught cold when he had gone out to relieve himself in the wee hours, while the minor children got diarrhoea and vomiting, before succumbing, the report said.
cold wave conditions and frost would occur at isolated places over western UP.
The weather remained dry and fog occurred at few places over the state, MeT department said.
Night temperatures largely fell in Agra, markedly fell in Meerut, appreciably fell in Moradabad and Bareilly and fell in Lucknow division, the MeT said.
Minimum temperature in the state at 4.7 degree Celsius was recorded at Agra.
The MeT forecast that moderate to dense fog would occur at a few places over the state during the morning hours.
It warned that cold wave conditions and frost would occur at isolated places over western UP during the next 48 hours.