Hyderabad, Oct. 17 -- Narcotics, cybercrime, terrorism, illegal immigration and the use of technology to conceal criminal activities have emerged as five major internal security challenges facing India, union Home Secretary Govind Mohan said on Saturday.

Addressing the passing-out parade of the 78th batch of IPS probationers at the Sardar Vallabhbhai Patel National Police Academy (SVPNPA) here, Mohan said the country's internal security landscape had undergone a significant transformation, with violent Left-Wing Extremism having ended, insurgency in the Northeast declining considerably and homegrown terrorism reduced to minimal levels.

However, he cautioned that these threats had not disappeared entirely, pointing to recent incidents, inc...