Sales in the mining sector decreased 3.3% on the month in May, while manufacturing sales were down 0.9%, the data showed.
By segment, sales of capital goods fell 5% on the month in May, while sales of durable and intermediate goods declined 4.5% and 1.7%, respectively. Energy sales increased 19.5% month-on-month, while sales of consumer goods edged up 0.2%.
On an annual basis, industrial sales rose 1.6% in May, again due to fewer sales in all sectors.
Mining sales decreased 4.7% in May compared with the same month of 2012, while manufacturing sales were down 1.5% on the year.
In January through May, Romanian industrial sales rose 5% on the year, fueled by a 5.3% increase in the manufacturing sector.