Police also recovered contraband worth around Rs one crore in international market from the accused, said Ravindra Yadav, Joint Commissioner of Police (Crime).
Cops from the narcotics cell of Crime Branch recovered 300 grams of premium quality heroin and 80 kg of marijuana, he said.
The arrested accused included Mohammad Israel, Mohammad Dastgir, Rani and Shakil Khan. They worked as drug peddlers and used to bring the contraband from other cities, he said.
Rani was arrested next, from Bawana in northwest Delhi, and recovered 300 gm of premium quality heroin from her, Yadav said.
The cops caught Shakil Khan from Uttam Nagar in the third operation and retrieved 45 kg of marijuana from him.
During interrogation, Israel and Dastgir revealed that they were bringing marijuana from Visakhapatnam.