Lawrence police are investigating at least four vehicle burglaries that occurred Tuesday morning in the 4500 block of Grove Drive near Harvard and Folks roads, according to police reports. Victims in the cases reported the burglaries occurred likely between 6 a.m. and 7 a.m. that morning, and in one case a $400 Apple 32-gigabyte iPod was taken from a vehicle owned by a 43-year-old Lawrence man.