New Delhi, Apr 13: The Ministry of Mines on Monday conducted a detailed review of security arrangements at the National Aluminium Company Limited's (NALCO) Damanjodi Mines following Naxal attack.

An urgent meeting of officials of the Mines and Home Ministries and NALCO, besides Central Industrial Security Force (CISF) representatives was held here.

It was decided to implement both immediate and long-term security measures for PSUs. Follow up meetings are also taking place at the State Government level.

On Sunday night, seven CISF personnel and four Maoists were killed in a gunbattle that took place in Orissa's Koraput District.

Over 100 miners were taken hostage, but were later freed.

Before leaving the area, the Maoists, including some women, robbed the CISF of huge quantities of sophisticated arms, ammunition and explosives.

The Maoist attack was apparently aimed at unsettling the upcoming polls process. (ANI)