Thiruvananthapuram | A man has hit his son on the head with a metal rod, causing grievous injuries, following an argument and a scuffle between the two at their residence here over the young man's demand for a luxury car, police said on Friday.

The incident occurred near Vanchiyoor on Thursday afternoon and the injured 28-year-old son is in a critical condition at the government medical college here, police said.

The father, who has been booked for attempt to murder under the Bharatiya Nyaya Sanhita, is currently in hiding, they added.

An officer of Vanchiyoor police station said that the father had bought his son an expensive motorbike recently, but the 28-year-old was not satisfied with that and instead asked for a luxury car.

On Thursday, there was an argument over the issue at their residence and the son physically attacked his father, who retaliated using a metal rod, the officer said.

According to neighbours and relatives of the family, the son is unemployed, always asks for expensive things and gets angry quickly if his demands are not met, police said.

"The father has switched off his phone and is in hiding. We have launched an investigation and are searching for him," they added.