Spanish Foreign Minister Miguel Angel Moratinos telephoned his Iranian counterpart Manuchehr Mottaki on Monday asking Tehran to use its influence to help find about the causes of an explosion in south Lebanon which killed six Spanish and Colombian soldiers. Today, Hezbollah has acted on the request and launched its own investigation into the bombing attack that targeted U.N. peacekeepers in southern Lebanon, a Hezbollah source said on Tuesday. "We are carrying out our own investigations and are ready to share (the findings) with UNIFIL (the United Nations Interim Force) if necessary," the source said.