Amid apprehensions that the newly launched Agnipath military recruitment scheme would change composition of several regiments that recruit youths from specific regions as well as castes, National Security Advisor (NSA) Ajit Doval on Tuesday said the regimental system will remain untouched under the scheme. "The concept of regiments, nobody is tinkering with it. If there are regiments, then there will be regiments of artillery, electrical or mechanical engineers or mechanical engineers. They (regiments) will continue...The regimental system has not ended," said Mr Doval, in an exclusive interview with ANI.