<br/><br/>In the backdrop of American terror suspect David Headley's several visits to India, the Centre warned five states against terrorist attacks particularly targeting military training academies.<br/><br/>Home Ministry sources said warnings had been issued to Uttarakhand,Gujarat, Uttar Pradesh, Delhi and Maharashtra as a precautionary measure after it was found during investigations that Headley had visited cities of these states and had done a recce of National Defence College and vital installations in other cities.<br/><br/>The states alerted have been asked to coordinate with the army authorities as well as the administration of the Indian Military Academy in Dehradun and Khadakwasla about the security to the vital installations.