Afghan President Ashraf Ghani on Tuesday accused Pakistan of waging an "undeclared war of aggression" against his country.Addressing a peace conference attended by 23 countries, the European Union, the UN and Nato, Ghani asked: "What will it take to convince Pakistan that a stable Afghanistan helps them and helps our region?"Pakistan and Afghanistan have long accused each other of turning a blind eye to militants operating along their porous border, and both forces exchanged fire over a border dispute last month, Dawn reported.Despite strained bilateral relations, Pakistan is attending the multinational conference. The two-member Pakistani delegation is headed by Additional Secretary UN and Economic Cooperation Tasneem Aslam.Ghani also warned the Taliban to embrace peace or "face consequences"."We are offering a chance for peace but this is not an open-ended offer. Time is running out... This is the last chance, take it or face consequences."If Taliban wants to join peace talks, the Afghan government will allow them to open an office, but this is their last chance," Ghani said.