A case has been registered against Tsao Lung for violating the Passport Act and the Foreigners Act along with cheating and forgery under the Indian Penal Code. His illegally obtained passport and Aadhaar card have been seized.

The police official told on Friday that Tsao had been living in India with the name Charlie Peng. He was arrested on September 13 from north Delhi's Majnu Ka Tilla.

However, no case was filed under the Official Secrets Act amid rumours that he was running a spy ring.

"We can't confirm whether he was here as a secret agent. However, in the course of investigation, we won't rule out that possibility," the official said.

Lung had Rs 3.4 lakh, $2,200, and 20,000 Thai baht, which have been confiscated.

According to the police, he married a girl from Mizoram and was currently staying in Gurugram.