WASHINGTON (Reuters) - The United States has issued a new round of sanctions targeting oil smugglers in Libya aimed at blocking exploitation of natural resources that is driving instability, the U.S. Treasury Department said on Monday.

In a statement, Treasury’s Office of Foreign Assets Control (OFAC) said it was sanctioning six people, 24 companies and seven vessels in a move that prohibits Americans from engaging with those targeted and freezes any related property under U.S. jurisdictions.

The sanctions target people from Libya, Malta and Egypt, according to the statement. Issued under the authority of a 2016 executive order by then U.S. President Barack Obama, companies based in Italy, Libya and Malta are also targets, the statement said.

The United Nations Security Council has condemned illicit exploitation of oil from Libya, which has been mired in conflict since an uprising in 2011 that overthrew Muammar Gaddafi, who led the country for more than 40 years.

“Oil smuggling undermines Libya’s sovereignty, fuels the black market and contributes to further instability in the region while robbing the population of resources that are rightly theirs,” OFAC’s statement said.

Libya’s oil production has steadied but is still well below the 1.6 million barrels per day it was pumping before the insurgency seven years ago and is suffering from theft, abduction and other security threats.

Production from at least one Libyan oil field has also been disrupted by a dispute over security guards’ pay.

(Corrects to Gaddafi led Libya for more than 40 years instead of 30 years, paragraph 4)