Congress President Sonia Gandhi has said, there should be no compromise on matters relating to national security and terrorism must be dealt with firmly.<br/><br/>Mrs Gandhi, in a message, expressed deep anguish at the loss of lives due to violence in parts of Jammu and Kashmir in the past few days.<br/><br/>She appealed people in the valley to allow political parties to find durable and enduring ways of fulfilling their aspirations meaningfully in a peaceful and democratic manner.