Suspected Tiger rebels set off another mine and fought a gunbattle with troops as the United Nations urged talks and Norway made a fresh bid to pull Sri Lanka back from the brink of war. Military officials said members of the Liberation Tigers of Tamil Eelam (LTTE) ambushed a navy bus by setting off a landmine in the restive northeast port district of Trincomalee Tuesday, leaving six sailors wounded. The explosive device rigged up to a bicycle went off as the bus passed by, a military official said, adding that the vehicle escaped the full impact. Full Story