ASTANA. December 10. KAZINFORM /Kanat Kulshmanov/ Prime Minister Karim Massimov calls on Kazakhstani ventures to invest actively in ensuring security at the productions. "The issue of investing in ensuring security in ore-mining enterprises must be fully solved by the heads of the ventures", K. Massimov said at the II Congress of the Workers of Ore-Mining Industry. "The problem must be considered in all aspects", he stressed.