TUNIS (Reuters) - Tunisia's opposition Islamist party Ennahda on Wednesday accused authorities of targeting and intimidating opponents, saying police had opened a new investigation into its leader, Rached Ghannouchi. The party said that the National Guard Division in Aouina was investigating Ghannouchi on accusations of describing the security services as a "tyrant." The political crisis in Tunisia intensified during the past year, after President Kais Saied dissolved parliament and took control of most of the powers, and granted himself wide powers within a new constitution approved in a referendum last week. Said says his moves were necessary to save Tunisia from years of political and economic failure, rampant corruption and nepotism. Ennahda and other parties describe Said's moves as a coup and say Said's new constitution and referendum, in which official figures say 30.5 percent of Tunisians voted, are illegal. Ghannouchi appeared before a judge last month to answer questions in a separate investigation into money laundering, charges he denied, describing the charges as political targeting. "What is happening is a new episode of targeting and intimidating political figures opposed to the coup and a ridiculous attempt to fabricate a file," Ennahda said in a statement on Wednesday. Officials from the Interior Ministry declined to comment.