Washington: The number of Islamic State fighters in Syria and Iraq is lower than at any time in the past two years, Deputy US Secretary of State Antony Blinken told a US Senate hearing on Tuesday.

"In fact, we assess Daesh’s (Islamic State`s) numbers are the lowest they’ve been since we began monitoring their manpower in 2014," Blinken said in testimony prepared for the Appropriations subcommittee hearing.