U.S. President Donald Trump on Wednesday accused the Organization of Petroleum Exporting Countries of raising oil prices, in a fresh swipe at the cartel's agreement to cap production.

An oil production shortfall in Iran and Venezuela may force OPEC and Russia to decide later this month to open their taps, the International Energy Agency said Wednesday.

The dollar extended gains against its peers in Asian trade Wednesday as investors await a key Federal Reserve decision later in the day, but most equity markets dipped.

Bitcoin, the star of the cryptocurrency world, is widely seen as a freewheeling tool as open as the internet itself.

European stocks markets faltered Tuesday as initial optimism faded over U.S. President Donald Trump's historic summit with North Korean leader Kim Jong Un, dealers said.

After months of sharp oil price rises there is now considerable uncertainty as to the market's direction for the rest of the year, OPEC said on Tuesday as a key meeting of oil producers looms.

Turkey's economy grew by a higher-than-expected 7.4 percent in the first three months of 2018 compared to the same period last year, official statistics showed on Monday.

The figure, released just two weeks ahead of a national election, beat the consensus market forecast of 7.0 percent growth.

Morocco and Nigeria have agreed a cooperation plan to press on with a proposed pipeline transporting gas to the North African kingdom along the Atlantic coast. 

Saudi Arabia, the United Arab Emirates and Kuwait have offered $2.5 billion in aid for Jordan to ease its economic crisis following a wave of anti-austerity protests, the Saudi state media announced early Monday.

Jordan has been rocked in recent days by mass protests against price rises and a proposed tax hike as the government pushes measures to slash the country's debt, leading to the prime minister's resignation.

Asian markets fluctuated Monday after the Group of Seven meeting ended with deep divisions between the US and its allies, while investors are looking ahead to Donald Trump's summit with North Korean leader Kim Jong Un.