Trump threatens to 'obliterate' Turkey's economy

US President Donald Trump has threatened to destroy Turkey's economy if Turkey goes "off limits" after his surprise decision to pull US forces out of north-eastern Syria.

In a series of angry tweets, Mr Trump defended the move that could open the way for Turkey to launch an attack on Kurdish fighters across the border.

The withdrawal was heavily criticised even by Mr Trump's Republican allies, BBC News reported.

Kurdish forces were key US allies in defeating the Islamic State in Syria.

The US has some 1,000 troops across Syria and about two dozen had been pulled out from the border area, according to a senior state department official.

The withdrawal was described by the main Kurdish-led group as a "stab in the back", and critics say it could facilitate an IS resurgence and leave Kurdish forces at risk of being attacked by Turkey, which regards them as terrorists.

On Monday, Turkey's defence ministry tweeted that "all preparations for the operation have been completed," adding the establishment of such a zone was "essential" for Syrians and for peace in the region.

But Mr Trump warned Turkey not to take advantage of his decision - which goes against the advice of senior officials in the Pentagon and state department - saying he could "destroy and obliterate" its economy.