The owner of a Melbourne tattoo parlour says she’s horrified after a gunman sprayed her family business with bullets this morning.

At least 16 shots were fired through the façade of Beautiful Body Art on Henry Street in Pakenham at around 12.30am today.

Detectives believe rocks and a Molotov cocktail may also have been thrown.

Robyn Hansen has owned the business for three and a half years and said she had no idea why her shop was targeted.

“Whoever has done this I think is a coward,” she told 9NEWS.

Police believe a 9mm firearm was used, but said they too were puzzled as to why Ms Hansen’s business was fired upon.

“It’s very concerning, we don’t want guns in the community,” Detective Sergeant Phillip Jury said.

“It's a legitimate business with no adverse involvements with police.”

Witnesses said two cars sped from the scene along Henry Street onto Cook Drive.