DUBAI, United Arab Emirates (AP) — American authorities seized a range of Iran’s state-linked news website domains they accused of spreading disinformation, the U.S. Justice Department said Tuesday, a move that appeared to be a far-reaching crackdown on Iranian media amid heightened tensions between the two countries.

The Justice Department said 33 of the seized websites were used by the Iranian Islamic Radio and Television Union, which was singled out by the U.S. government last October for what officials described as efforts to spread disinformation and sow discord among American voters ahead of the 2020 presidential election.

The U.S. says three other seized websites were operated by the Iraqi Shiite paramilitary group, Kata’ib Hizballah, which more than a decade ago was designated a foreign terrorist organization. The group is separate from the Lebanese militant Hezbollah group whose news websites remained operational.

The website domains are owned by U.S. companies, but despite the sanctions, neither the IRTVU nor KH obtained the required licenses from the U.S. government before using the domain names, according to the Justice Department.

The Justice Department announcement came hours after the Iranian state-run news agency IRNA revealed the U.S. government seizures without providing further information.

The takedowns come as world powers scramble to resurrect Tehran’s tattered 2015 nuclear deal and just days after the election victory of Iran’s hard-line judiciary chief, Ebrahim Raisi. On Monday, Raisi, known for his hostility to the West, staked out a hard-line position in his first news conference. He ruled out the possibilities of meeting with President Joe Biden or negotiating over Tehran’s ballistic missile program and support for regional militias — concerns the Biden administration wants addressed in future talks.

Relations between Iran and the U.S. have deteriorated for years following President Donald Trump’s withdrawal from Tehran’s nuclear deal and the return of devastating sanctions on the country. That decision has seen Iran, over time, gradually abandon every limit on uranium enrichment. The country is now enriching uranium to 60%, its highest level ever, though still short of weapons-grade levels.