More than 1,000 foreign jihadists are streaming into Syria and Iraq each month despite the ongoing international aerial military campaign there, the United States has warned.

U.S. intelligence and counterterrorism officials have said the U.S.-led military campaign against the Islamic State of Iraq and Syria (ISIS) has neither deterred nor led to a surge of foreign militants travelling to Syria.

“The flow of fighters making their way to Syria remains constant, so the overall number continues to rise,” The Washington Post quoted a U.S. intelligence official as saying. […]