A swastika flag and two Chinese flags branded with the words "COVID-19" have been strung up on a phone tower in central Victoria.

Police are investigating what is suspected to be a case of trespass at a property in Kyabram on April 12.

A large swastika has been planted on the top of a phone tower at Kyabram. There are also two Chinese flags. Credit:Source: Nine News

"It is believed three flags were hung on the Bradley Street phone tower between 12am and 6am," a police spokesperson said.

The investigation is ongoing and Victoria Police is liaising with the telephone company to arrange the removal of the flag.