Three other people were injured in the collision.
Gardai are appealing for witnesses to a serious crash in Westmeath in which a man in his 20s was killed and three others injured.
The man was a passenger in a car that collided with a jeep on the N4 at Ballinafid at around twenty past nine yesterday morning.
Two other men in their 20s were also in the car - one's in a serious condition at Beaumont Hospital, while the driver's being treated for non-life threatening injuries at Mullingar Hospital.
The driver of the SUV, a man in his 60s, is being treated for serious injuries in Tullamore Hospital.