The police said they came to check complaints about ArmNews' anchor appearing on air without a medical mask.
Samvel Farmanyan, the station's co-owner, charged that the visit appeared to signal Armenian Prime Minister Nikol Pashinyan's intent to “declare war on the media.”
“He will suffer a shameful defeat,” said Farmanyan, a former lawmaker.
ArmNews executives said they had been told by the head of the national broadcasting commission that it wasn't mandatory for anchors to wear masks while on the air.
The police also visited another opposition-leaning TV station, Channel 5, to look into a similar complaint of anchors not wearing masks.
Both stations have been critical of Pashinyan's activities, closely scrutinizing his government's response to the coronavirus pandemic and its economic policies.