Four people have been charged as part of an investigation into a spate of tit-for-tat tobacco and vape store arson attacks that police have linked to the Finks bikie gang.

The charges come after Victoria Police raided six Melbourne residential properties and a business on Friday as part of a crackdown on gang-related violence, which has ramped up recently as groups battle to control the illegal tobacco trade.

A 33-year-old man from Epping was charged with arson and related offences, two counts of motor vehicle theft, burglary and drug possession.

A 40-year-old man from Kilmore was charged with arson and related offences, two counts of motor vehicle theft and three counts of handling stolen goods. He will also be charged with committing indictable offences while on bail.

A 31-year-old woman from Flemington was charged with arson and related offences, two counts of motor vehicle theft, burglary and drug possession.

A 43-year-old man from Melton was charged with possessing synthetic cannabis.

A battle between Middle Eastern organised crime entities and motorcycle gangs has been linked to 11 arson attacks on tobacconists dating back to March, causing damage to shops in Springvale, Moonee Ponds, Deer Park, Hoppers Crossing, Wodonga and Wangaratta.

As part of the investigation, two men connected to the Finks were arrested and two firearms were seized earlier this week.