In the biggest narcotic haul in Delhi in recent times, the Delhi police has seized heroin worth Rs 41 crore and arrested the alleged kingpin of an inter-state drug trafficking chain and his associate, a senior police official said on Thursday.

Gurnam Singh, wanted by police in Delhi and Punjab and by the Directorate of Revenue Intelligence, was arrested by the Special Cell of the Delhi police from Mahipalpur near the Delhi-Haryana border in the wee hours after they got a tip-off about his movement.

Singh, a resident of Amritsar in Punjab, was intercepted on the Delhi-Jaipur highway after police got information that he was shifting huge quantity of heroin from his hideout in Delhi to Ambala, Deputy Commissioner of Police (Special Cell) Alok Kumar told PTI in New Delhi.

Thirty-seven kg of Afghan-origin high-quality heroin, worth Rs 37 crore in the international market, and the Hyundai Santro car in which he was travelling were seized, he added.

Police had on Tuesday arrested Singh's associate, identified as Jaswinder, from a restaurant on the G T Karnal road in South-West Delhi when he reached there to deliver 4 kg of heroin to some unidentified persons.

On his interrogation, he revealed that the contraband belonged to Gurnam Singh and divulged information about his hideout in Delhi.

Singh, apprehending a police raid, was shifting the contraband to another location in Ambala when he was arrested, the official said.