Rishi Sharma, a colonel-rank officer deputed as administrator of Defence Research and Development Organisation (DRDO) at Shamirpet near here, was arrested yesterday on a complaint lodged by the victim's family, said Inspector V Umender of Rajendra Nagar police station.
Sharma, who made acquaintance of the young woman in January this year, visited her in the same month one day when she was alone at home and raped her, the complaint said.
He later warned her not to disclose the incident to anybody.
Following the complaint, a case was registered yesterday and Sharma was arrested.
Medical examination of the victim revealed that she is pregnant, the police said.