The FBI has seized more than $560,000 in cryptocurrency donations intended for Hamas, and the US Justice Department said it had disrupted the group's fundraising and recruitment network online. Announcing the operation on Tuesday, the department said it had taken control of website domains and communication platforms used for fundraising and recruitment, and obtained information about thousands of people who had contacted Hamas with the aim of giving money to the group.

Jeanine Pirro, the US attorney for the District of Columbia, said in a video statement: "My message to Hamas is clear: your networks are not secure, your crypto is vulnerable, and we will not stop until your ability to wage war is defeated."

Investigation details

According to FBI affidavits filed in connection with the seizures, Hamas began testing virtual currency fundraising in or around early 2019 through its Qassam Brigades, or military wing. The group sought donations on its Telegram channel and also used direct online fundraising. The affidavits said Hamas officials had claimed the currency would be untraceable, and that their websites gave instructions on how to make anonymous donations.

A major investigative breakthrough came last year when FBI officials identified a financing network seeking donations to the Qassam Brigades through virtual currency. A confidential source in the United States then alerted law enforcement to a Telegram post asking for contributions to an email address linked to Hamas.

Brett Leatherman, an FBI assistant director in charge of its cyber division, said the bureau would "continue to use its authorities to intercept illicit funds and prevent terrorist organisations from exploiting digital networks to finance their operations."

Hamas officials could not immediately be reached for comment.