Poor visibility due to dense fog caused several accidents killing three persons in Siddhartnagar district, and two each in Hardoi and Lakhimpur Kheri districts, officials said today.
Meanwhile, an elderly man died of cold at Lauhrani in Siddhartnagar district yesterday, while another died near Shastri Chowk in Basti district, the officials said.
MeT officials here said dense fog occurred at most places over eastern Uttar Pradesh while isolated places in western region were covered by moderate fog.
Muzaffarnagar recorded the state's lowest temperature at 5.5 degrees Celsius, the MeT officials said.
Police said three farmers were killed when their tractor trolley overturned on Sirsiya-Machiya road near Dhanohar bridge in Siddhartnagar district while two others died in Sandila of Hardoi district where a tractor trolley was hit by a train at a railway crossing.