Vinod Singh (38) and Rajendra (40), both doctors, and Abhimanyu (30) and three others were returning to Lucknow from Gwalior when their car lost control and rammed into the stationary truck yesterday, they said.
All of them were rushed to a hospital where Singh and Rajendra were declared brought dead, while Abhimanyu died during treatment.
The condition of injured was stated to be stable.