The resignation opens a new chapter in Haiti's political turmoil as it struggles to recover from the devastating 2010 earthquake.

Conille resigned after clashes over an investigation launched by lawmakers concerning foreign passports held by senior government officials, including President Michel Martelly. Haiti does not recognize dual nationality.

Martelly said in an address to the nation late on Friday that he had accepted the resignation, but that he regretted the moving coming "at a time when the country is taking off."

Martelly vowed to "rapidly" nominate a successor, and said he had assured "our partners of the international community" that he had taken measures "to allow the state to operate normally."