WASHINGTON — Federal authorities Thursday designated the notorious MS-13 street gang, also known as Mara Salvatrucha, as a “transnational criminal organization,” giving federal authorities more tools to fight the group that has its roots in Los Angeles.

Under the designation, federal officials said they can now seize assets of gang members found within the United States jurisdiction.

The designation is the first for a U.S. street gang. Among the organizations similarly designated are Japan’s Yakuza and Mexico’s Zetas, whose leader, Heriberto Lazcano, was killed by Mexican marines on Sunday. An armed gang later stole his body from a funeral parlor.

The administration is targeting the economic core of MS-13 and the individuals who work with, enable or support it by freezing any assets that those individuals may have under U.S. jurisdiction.

Hagar Chemali, a spokeswoman for the Treasury Department said Thursday, “It is our hope that this action will generate caution within the formal financial sector to the operations of this group.

“Financial institutions across the U.S. and foreign branches of U.S. financial institutions are obligated to immediately identify and freeze property or property interests of MS-13 and to report any such blocked assets to the Treasury Department.”

Money generated by local MS-13 groups in the United States is funneled back to the group’s leadership in El Salvador, but the official designation will make it more difficult for members of the gang to use banks and wire transfers to move their profits.

Juan Zarate, former deputy national security adviser under President George W. Bush, said Thursday the designation is a signal from the administration that it considers MS-13 to be a significant international threat.

“There is likely a sense that Mara’s power comes from its ability to make money,” Zarate said.

Shannon O’Neil, a senior fellow for Latin American Studies at the Council on Foreign Relations, said the official designation is likely to make a real difference.

“It (the designation) prioritizes MS-13 over many other criminal organizations and suspicious flows of money,” O’Neil said.

Southern California authorities, who have been fighting MS-13 for years, expressed support for the move.

“As the reach of gangs becomes more international, the seizing and freezing of assets becomes essential to addressing the violence that comes along with it,” said Los Angeles Police Chief Charlie Beck.

“We certainly welcome the increased participation of our federal partners in dealing with MS-13,” added Long Beach Police Chief Jim McDonnell. “It’s another tool that we didn’t have before. It will help authorities on a macro level, which will supplement gang injunctions and traditional gang enforcement activities that have been employed for years.”

MS-13 began among El Salvadoran refugees — many of them young ex-soldiers — who came to Los Angeles to escape civil war in their home country in the 1980s. Salvadorans congregated in large numbers in L.A.’s Pico-Union neighborhood and the area near MacArthur Park, which is where the gang started.