The United States military has launched fresh strikes on Iranian targets in response to Tehran’s attack on American forces in Jordan, according to the Guardian. The move ends a days-long pause in violence between the two sides and, the outlet reports, raises the risk of a return to all-out war in the region.

The new strikes were launched hours after President Donald Trump vowed to hit Iran “very hard,” the Guardian reported. His comments came after Iran targeted a base in Jordan that hosts US troops on Wednesday.

The attack on the base in Jordan followed joint US-Saudi strikes on militants in Iraq the day before, according to the Guardian. That sequence of events points to a widening arena of conflict spanning multiple countries in the region.

The renewed exchange breaks a brief lull in fighting between the US and Iran. The Guardian described the pause as lasting several days before the latest violence resumed.

The developments have fueled concerns about a broader escalation. According to the Guardian, the strikes raise the risk of a return to all-out war across the Middle East, an outcome that would carry significant consequences for the wider region.