ROUGH CUT (NO REPORTER NARRATION)<br/> <br />A gas pipeline in central Ukraine exploded on Tuesday (June 17) along the main pipeline route that carries Russian gas through Ukraine to the rest of Europe.<br/> <br />Video released by Ukraine's Emergencies Ministry showed flames erupting from the pipeline near Lokhvitsya in Ukraine's Poltava region and emergency personnel surveying metal parts strewn across a field.<br/> <br />Ukraine's interior minister said on Wednesday (June 18) the explosion had been caused by a bomb, prompting the prime minister to order security reinforcement on the country's gas pipeline network.<br/> <br />The explosion came after Moscow cut gas supplies into Ukraine in a long-standing pricing row with Kiev.<br/> <br />Ukrainian Prime Minister Arseny Yatseniuk on Wednesday ordered security to be strengthened at pipeline installations.<br/> <br />Though there were no casualties and gas flows were not interrupted, the blast increased tension as Kiev, which is trying to end an uprising by pro-Rus