Zbigniew Brzezinski, a former national security advisor, has warned that the US could witness riots if economy continues its downward spiral.

"There's going to be growing conflict between the classes and if people are unemployed and really hurting, hell, there could be even riots!" said Brzezinski, President Jimmy Carter's national security advisor, in a recent interview with NBC.

"In 1907, when we had a massive banking crisis, when banks were beginning to collapse, there were going to be riots in the streets," he added.

At least 3.6 million jobs have been wiped out throughout the US since the recession began in December 2007. The jobless rate officially reached a 16-year high of 7.6% (11.6 million people) last month.

Earlier this week, a new Federal Reserve report said that US unemployment could increase to 8.8%, causing the economy to contract for a full calendar year for the first time since 1991,…