The complainant, who lives in Australia, has said that she has come here for a visit home. The incident came to light after she called up Delhi Police's recently relaunched foreigners' helpline on Wednesday and reported the matter.
The accused, identified as Pintu, has been arrested under relevant sections of IPC, a police official said.
The complainant told the police that the security guard often used to follow her home in the evenings and on a few occasions he even tried to touch her on the pretext of helping her in closing the main gate of her house premises, he said.