Turkey: At G20 meeting U.S. President Barack Obama says the United States had no precise intelligence warning of the Paris bombing. France: President Francois Hollande says constitution must be amended and security spending increased to better deal with crisis situations after Paris terrorist attack. Belgium: Police launches a major operation in the troubled Brussels district of Molenbeek, where a number of arrests have been made following the bloody attacks in Paris. USA: Islamic State militants released a new video threatening Washington D.C. with Paris-style terror attacks. Greece: Migrants continue to arrive on Greek island of Leros where Paris shooting suspect registered.