New Delhi, June 9: The Congress on Saturday slammed the Bharatiya Janata Party (BJP), saying the issue of Maoist threat to Prime Minister Narendra Modi should be investigated and not used for “petty politics”. Briefing the media here, Congress spokesperson Pawan Khera said a threat to the security and the safety of the Prime Minister cannot be dismissed lightly even if it is a rumour or appears suspicious. (IANS)