An alleged sharpshooter carrying a reward of Rs 1 lakh was arrested on the DND Flyway, police said on Saturday.
Pradip Rana, 35, was arrested following a tip-off on the flyway on Thursday evening, said DCP (Special Cell) Pramod Kushwaha.
He tried to escape by whipping out a country-made gun but was overpowered before he could open fire at the police team, Kushwaha said, adding that two sophisticated revolvers, a pistol and live cartridges were seized from his possession.
Rana was being pursued by the police in connection with serious crimes, including contract killings and ransom demands. He was allegedly involved in three contract killings, and extortion demands from bookies and property dealers.
A cash reward of Rs 1 lakh was announced last year by the Delhi Police to anyone who provided information leading to his arrest, the DCP said.
During interrogation, he admitted to his role in abduction of a real-estate developer, Ram Pratap, from Rohini Sector 24. He named his accomplices as Paramjeet Dalal, Deepak Chauda and Mohit Chhabra, the officer said.
"The kidnappers released the realtor after Rs 26-lakh ransom was paid to them," he said.
Chauda and Chhabra were arrested earlier, Dalal remains at large.
Rana was previously arrested in connection with cases registered under the Arms Act in 2012 and 2015, Kushwaha said.
In March 2015, Rana and his aides were allegedly involved in a double murder in Bindapur area.