The first incident occurred at WVIT Channel 30 in West Harford and the second at WTNH Channel 8 in New Haven.
Authorities said a Caucasian man in his 40s with grayish hair was spotted leaving a suspicious package in the lobby of Channel 30 on New Britain Avenue around 4:10 a.m. Monday.
It is believed the same person, who was last seen driving a late model small silver car, dropped off a second package at Channel 8 on Elm Street about an hour later.
The bomb squad is investigating both incidents. Streets around both buildings are currently closed.