Two aggravated robberies at dairies in Hawke's Bay have pushed the region's tally to 38 for this year alone.
Eastern District prevention manager, Inspector Dean Clifford said the figure included reported robberies of individuals and commercial properties.
"This level of offending is of big concern to police," he said. "We want to prevent anyone we can from becoming a victim of crime and are investigating thoroughly."
A number of people have been arrested and police have visited business owners during the past six months to offer prevention advice.
On Sunday, two men with a hammer stormed into the Grays Rd Convenient Store and Takeaway, one offender smashing the cabinet and the computer screen on the counter, while the other went to the cigarette cabinet.
The woman hid in the corner of her shop and does not think they saw her.