In the first mishap, Delhi resident Pintoo Sahni got killed late last night when the Scorpio car he was travelling in overturned after hitting a divider, they said.
Pintoo was going to Agra via Yamuna Expressway along with his family members.
Ram Lakhan, Kapil and four other family members of Pintoo got injured in the mishap and were admitted to hospital.
Their condition is stated to be stable by late evening today, police said.
In the other mishap, an unknown vehicle hit a tractor last night, killing its driver Dhiraj on the spot.