Kolkata, July 06: West Bengal Chief Minister Buddhadev Bhattacharjee today apprised Deputy Prime Minister L K Advani of the law and order situation in the state, particularly infiltration from across the Bangladesh border and ISI activities, official sources said. The chief minister who met Advani at the Raj Bhavan was understood to have also told him of the activities of ultras in the northern and southern parts of the state. He also discussed the feasibility of introduction of identity cards to people living in the border areas. Bureau Report