By Olga Dzyubenko BISHKEK (Reuters) -Kyrgyzstan said on Friday it agreed a ceasefire with its Central Asian neighbour Tajikistan after a deadly border conflict between the two Russia allies escalated towards war, involving tanks and rocket artillery. The former Soviet republics earlier accused each other of restarting fighting in a disputed area which has left at least three dead and dozens wounded. The ceasefire was set to take effect from 16:00 local time (10:00 GMT), Kyrgyz border guards said in a statement. Earlier on Friday, Moscow urged a cessation of hostilities. Kyrgyzstan has said Taj…