Sub-Inspectors I D Rathore and N R Kotwal were found lax during vehicle checking when a security drill was underway to verify alertness of personnel posted to guard the seat of power in the state capital, police said.
"A private vehicle was sent as decoy in which there were five to six persons armed with weapons. But, the vehicle was allowed to enter the Secretariat without checking and proper verification by the two PSIs who were stationed at Gate No. 1 and 4 of the building," an official said.
Gujarat Police stepped up Modi's security following bomb blasts at his public rally in Patna late last month.
According to top security officials, the BJP's Prime Ministerial candidate, whose inner security cordon is manned by elite counter-terror force NSG, is on the radar of terror organisations like Indian Mujahideen.