Thirteen teenagers, one as young as 13, have been arrested over a robbery and car theft at a home in St Albans, in Melbourne's west.

Police said the robbery happened at a property on George Street at 11:30pm on Monday.

The teens — three girls and 10 boys — are all aged between 13 and 17, and come from the western suburbs.

Police said they were being interviewed and some would appear before a children's court.

Victoria Police has ramped up its efforts to crackdown on often violent carjackings and burglaries after a spike in the crimes across the state, particularly in Melbourne.

The jump in crime prompted one of the state's most senior officers to warn Victorians to take extra security and safety measures at home.

Police said investigators had been given additional resources, while more day and night patrols were being conducted at high risk locations.

More than 75 people have been arrested since the operation began in May, police said.