BHOPAL: A woman has lodged a complaint against an unknown person for threatening her with acid attack. According to the police, Nafisa Khan (assumed name), who lives in Shaheed Nagar, received a call on her mobile on January 8. The person made lewd remarks and also sent vulgar text messages to her. When he called her again, she shouted at him, whence he threatened her with acid attack. She related the incident to her father and both of them reached the Koh-e-Fiza Police station on Wednesday to lodge an FIR. Police are trying to locate the accused on the basis of mobile number.