NEW YORK: Thirty-four terror groups from around the world had reportedly pledged allegiance to Daesh as of mid-December — and that number will only grow in 2016, UN Secretary-General Ban Ki-moon has said.

Ban said Daesh poses “an unprecedented threat,” because of its ability to persuade groups from countries like the Philippines, Uzbekistan, Pakistan, Libya and Nigeria to pledge their allegiance.

He said UN member states should also prepare for an increase in attacks Daesh associated groups traveling to other countries to launch attacks and develop networks.

“The recent expansion of the Daesh sphere of influence across west and north Africa, the Middle East and south and southeast Asia demonstrates the speed and scale at which the gravity of the threat has evolved in just 18 months,” Ban said, using another abbreviation for the group.

Adding to the threat, Daesh is “the world’s wealthiest terrorist organization,” Ban said, citing estimates the group generated $400-$500 million from oil and oil products in 2015, despite an embargo.

According to the UN mission in Iraq, cash taken from bank branches located in provinces under Daesh control totaled $1 billion. The mission also estimates that a tax on trucks entering Daesh controlled-territory generates nearly $1 billion a year, he said.

Ban said Daesh continues to maintain its presence in Syria and Iraq and is expanding to other regions despite international efforts to oust them.