Karan received wounds on his neck and abdomen, police said.
Following a tip-off, two policemen conducted a raid at a Punjabi Bagh area park in west Delhi Tuesday night.
When the police enquired about his suspicious activities, Karan took out a knife and slashed his neck and abdomen.
Police said he was admitted to a government hospital where his condition was stated to be out of danger.
It is not known whether he is a history-sheeter. Further investigations were on
Photos: Alia Bhatt, Sunny Deol at an event in Mumbai
Photos: Akshay Kumar, Taapsee Pannu promote 'Naam Shabana'
Flashback: When sexy models sizzled in bikinis at Tokyo fashion show
Photos: These Indian cities top the list in online purchase of sex products
In pictures: Indian-origin artistes in Hollywood