The prosecutor of the International Criminal Court says her office is "steadily progressing" in its investigation of crimes committed in Libya and expects to issue new arrest warrants "in the near future."

Fatou Bensouda told the U.N. Security Council on Wednesday that there has been "significant progress" in investigating crimes committed not only in 2011 but more recently, including sending an ICC team to Libya in March for the first time since June 2012.

But she said "even though my office is making important progress, significant challenges remain."

The Security Council referred Libya to the ICC in February 2011 during Libyan leader Moammar Gadhafi's bloody crackdown against anti-government protesters. The uprising against Gadhafi's 42-year rule quickly escalated into civil war, and ended in October 2011 with Gadhafi's capture and death.