Three rockets landed inside Baghdad’s Green Zone on Tuesday morning, Iraqi police sources informed Reuters. The Green Zone houses government buildings and foreign delegations.

The rockets were launched from Zafaraniyah district outside Baghdad and are linked to Iranian militia support as tensions rise between the U.S. and Iran, according to reports.

Witnesses inside the Green Zone said the alarm sirens blared at the U.S. Embassy Complex when the three Katyusha rockets were fired. Reports on the ground indicated people on the streets were told to take shelter immediately. No casualties were reported.

The rocket strikes come 18 days after the U.S. ordered the killing of Iranian general, Qassem Soleimani, who was organizing an attack on American embassies and had threatened U.S. assets, according to intelligence assessments given to President Donald Trump.

The Trump administration has deployed approximately 14,000 military personnel to the Persian Gulf since May, 2019 in an effort to bolster defenses in that region.

Meanwhile, Iranian threats against President Trump have intensified after the killing of Soleimani. In one case, an Iranian lawmaker says he is offering a $3 million reward to anyone who kills Mr. Trump. Robert Wood, the U.S. disarmament ambassador, said it was ‘ridiculous’ and told reporters in Geneva the threat shows the ‘terrorist underpinnings’ of the Iranian regime, according to Reuters.