Terror alert was sounded in Gujarat and all metros by central security agencies on Sunday after reports of 10 terrorists suspected to be from Pakistan entering the western state emerged.
According to reports, the suspected terrorists planned to carry out attacks against high-value targets.
Gujarat chief minister, Anandiben Patel, told reporters that all necessary measures had been taken and there was nothing to worry.
Earlier on Sunday, all cultural programmes scheduled to be held at Somnath temple on occasion of Maha Shivratri were cancelled because of terror threats.
News agency PTI reported that the state government also cancelled leave of all police personnel.
Two NSG teams comprising nearly 200 personnel have been sent to Ahmedabad from Delhi.
Advisory was also issued to enhance security at all strategic locations, sensitive industrial sites and religious places after intelligence inputs suggested that the terrorists have entered Gujarat taking the sea route, official sources said.
This came after the BSF seized a Pakistani fishing boat on Friday as its occupants fled upon seeing the security personnel in the Koteshwar creek area off the Kutch coast along the Indo-Pakistan border, heightening the security concerns.
The latest terror alert assumes significance in the wake of 2 January Pathankot terror attack, which killed seven security personnel.
Gujarat DGP P C Thakur said combing operations had started across various locations. Policemen were seen patrolling the highways since early this morning.