Six persons were killed on Sunday in separate fog-related mishaps in Uttar Pradesh, said police.
Four persons were killed and five others injured when a truck hit a van near Lalaganj locality in Gopiganj area in Bhadohi, they said.
The incident took place due to dense fog, killing the four persons on the spot.
The injured have been rushed to a hospital, where their condition was stated to be stable.
Police is trying to ascertain the identity of the victims.
Meanwhile, in a separate incident, two elderly persons were killed and seven others injured when a roadways bus hit a jeep in Haldharpur area due to fog in Mau district, police said.
Teju Yadav (60) and Jagdish Yadav (70) were killed on the spot in the mishap, they said.
The injured have been rushed to a hospital, where their condition was stated to be serious.