The U.S. Treasury Department sanctioned five al-Qaida supporters for allegedly helping the militant group with financial assistance.
The department said the operatives supporting al-Qaida were working out of Turkey.
"We will continue working with our foreign partners, including Turkey, to expose and disrupt al-Qaida's financial support networks," Treasury Department official Andrea Gacki said in a statement.
Five individuals named
The department said Egyptian lawyer Majdi Salim, whom it described as the main facilitator, was sanctioned, along with Muhammad Nasr al-Din al-Ghazlani, an Egyptian financial courier, and Turkish citizens Nurettin Muslihan, Cebrail Guzel and Soner Gurleyen.
"As a result of today's action, all property and interests in property of these individuals named above, and of any entities that are owned, directly or indirectly, 50 percent or more by them, individually, or with other blocked persons, that are in the United States or in the possession or control of U.S. persons must be blocked and reported to OFAC (Office of Foreign Assets Control)," the department said in a statement.
"Unless authorized by a general or specific license issued by OFAC or otherwise exempt, OFAC's regulations generally prohibit all transactions by U.S. persons or within the United States (including transactions transiting the United States) that involve any property or interests in property of blocked or designated or otherwise blocked persons," the statement added.
Some information for this report came from Reuters.