An Indian national was arrested from the Pakistani capital on Sunday over possessing incomplete travel documents, local TV channels reported.
Sheikh Nabi Ahmed, who hailed from Jogeshwari East in Mumbai, was arrested from F-8 area of Islamabad.
According to police, the man was detained during routine patrol on May 19, Samaa TV reported.
A case has been filed against him under Article 14 of the Foreigner Act and he has been sent to jail on judicial remand.
Ahmed was taken into custody on May 19 after he failed to produce any travel or visa documents, the Express Tribune reported.
According to police, the Indian national was walking along Nazimuddin Road in F-8 when he was stopped at a check post. Police demanded to check his visa documents after he told them that he was an Indian. However, Ahmed could not produce any document and was taken into police custody, the daily said.
The address on Ahmed's passport is of Jogeshwari (East) but according to the Meghwadi Police, Ahmed sold his property almost five years ago and has now shifted to
someplace in Jogeshwari (West), the police said.
Mumbai Police spokesperson Rashmi Karandikar said, "It is the matter of Ministry of External Affairs (MEA)."
An official of the Indian high commission, however, said that the mission does not have any information about the arrest so far.
He has been booked for illegal entry and stay in the country under Foreigners Act 1946 and sent to jail on judicial remand, the daily said.
The arrest came days after the International Court of Justice stayed the execution of Indian national Kulbhushan Jadhav, who was sentenced to death by a Pakistani military court on charges of "involvement in espionage and sabotage activities" against the country.
Pakistan claims its security forces arrested him from its restive Balochistan province on March 3 last year after he reportedly entered from Iran.
However, India maintains that he was kidnapped from Iran where he had business interests after retiring from the Navy.
Jadhav's case is the latest flash-point in the tensions between Pakistan and India.