The car was badly damaged in the collision.
An Emirati was moderately injured in the incident.
A 66-year-old father and his 11-year-old son, Comoros Islands, succumbed to fatal injuries they received in a gruesome accident on the Sheikh Rashid road, close to Al Naeem City Centre, in Ras Al Khaimah.
Three other people, including the dead man's other two sons aged 12 and 14 sustained serious injuries in the grave collision involving two saloon cars, according to a senior police officer. In the other car, an Emirati driver sustained moderate injuries.
Brigadier Dr Mohammed Saeed Al Humaidi, director general of the central operations department, RAK Police, on Friday morning said they were alerted of the mishap on Thursday afternoon around 3.20pm.
"Traffic police patrols, ambulances, paramedics and rescue teams were immediately dispatched to the site in a record time, and removed the crashed cars off the road."
Initial enactment of the accident shows that the deceased driver was blamed for the collision. He erringly took a U-turn and entered into the other road without making sure it was clear.
"The 21-year-old Emirati citizen was correctly driving his car when he was surprised with the 66-year-old father and could not avoid colliding with his car, killing him, and his 11-year-old son, unfortunately."
"The bodies of the father and his son were shifted to the morgue of the hospital for burial by relatives, while all the injured people were rushed to the hospital for treatment and medical care."
Urging motorists, Brig Humaidi said all drivers need to strictly observe traffic rules and regulations to ensure road users' safety and theirs. "All drivers should never ever make a U-turn without making sure that the other road is clear because so many deadly accidents take place because of the same error."