The accused have been identified as Tayyab (59) and Ahshan (33), both natives of Tehran.
Assistant Commissioner of Police (Crime Branch) Preet Pal Singh said: "Turkmenistan national Kadyr Hayytbayev, who was here on a medical visa, and his sister Sanam were walking outside a guest house where they were staying around 4:30 p.m. They were intercepted by three people who were in a car".
One of the three asked them to show passports and demanded money for police verification, insisting the exercise was a normal activity to curb illegal stay of foreign nationals, Singh said.
The ACP said: "After checking the wallet, the three returned it to the victims. But when Hayytbayevs checked the purse, they found $2,000 missing from it".
The victim then contacted a company associated with the hospital which facilitates interpreters during treatment. Then, a representative of the company registered an FIR with the Gurugram Police, Singh said.
The police on Tuesday got a tip-off that two such persons are living in a rented accommodation in Delhi's Lajpat Nagar. Working on the information, the two were arrested from the spot, he said.
Singh said: "The accused came to the country on November 10 on a tourist visa. They have confessed to the crime and $984 were recovered from them. The Iranian Embassy has been informed about their arrest".
( With inputs from IANS )