Television journalist Munni Saha filed a general diary with Gulshan Police Station on Thursday hours after receiving an envelop containing a bullet, a letter and a piece of sandal wood.
An unknown person left the envelop at the entrance of her residence Wednesday evening when she was out of the capital, Munni told The Daily Star.
Munni, head of news of the private television station ATN News, said her younger brother informed her over phone later at night.
Siddique, a sub-inspector of the police station, confirmed the incident without giving any details.
Munni said a man identifying himself as Nabi had called her several times demanding money as extortion.
She informed the inspector general of police on October 16 as Nabi kept threatening her continuously over cell phone.