The Home Ministry has sounded a country-wide terror alert, especially for Mumbai, Ahmedabad, Goa and Bangalore, after getting intelligence inputs that Pakistan-based group Lashkar-e-Taiba was planning to strike.The Centre asked all the states to tighten security by deploying additional forces in all sensitive locations to prevent any terror attack. AIR correspondent quoting official sources reports, the police of Mumbai, Ahmedabad, Goa and Bangalore have been put on high alert and specific instructions have been issued for taking all possible steps to foil any attempt by LeT terrorists to disturb peace.The software hub Bangalore and tourists paradise Goa are also high on the list of terrorists.Security forces have already launched house-to-house searches in some specific areas in Mumbai. Additional forces have been deployed in all sensitive and crowded places, including markets, religious places, bus stops and railway stations.