The alleged offenders ran off, taking a small amount of chocolate.
CCTV footage of the area provided a description of the alleged offenders. Police searched the area and found two people nearby, about 30 minutes later.
A 14-year-old and 16-year-old will be charged with burglary and unlawfully taking a motor vehicle, and will be dealt with by Youth Aid.
Another Whanganui commercial building was broken into and items stolen during the weekend. Police said a window at New World was smashed, the building entered and one or more people left on foot with a large quantity of cigarettes.
Police are investigating.