BAGHDAD (AP) — Iran has instructed allies across the Middle East to be on high alert and avoid provoking tensions with the U.S. that could give an outgoing Trump administration cause to launch attacks in the U.S. president's final weeks in office, Iraqi officials have said.

The request — delivered by a senior Iranian general to allies in Baghdad this week — reflects the growing regional anxiety over President Donald Trump’s unpredictable behavior and the uncertainty in the chaotic transition period until President-elect Joe Biden takes over in two months.

Iran’s allies have collectively welcomed Trump’s election defeat. Under his presidency, tensions with Iran escalated, reaching fever pitch at the beginning of the year with the U.S. airstrike that killed Iran’s top general, Qassim Soleimani, at the Baghdad airport. Iran launched a ballistic missile attack in response to the fatal drone strike, targeting U.S. soldiers in Iraq and wounding dozens.

Trump also unilaterally withdrew America in 2018 from Iran’s nuclear deal with world powers, meant to prevent it from developing nuclear weapons, and re-imposed punishing sanctions on Iran, crippling its economy.

Iran has since abandoned all limits on its uranium enrichment program, even as the deal’s other international partners have tried unsuccessfully to salvage it. The incoming Biden administration has stated plans to rejoin or renegotiate the 2015 nuclear accord.

But there is growing concern over what Trump, who is refusing to concede the election, might do in the last days of his presidency — including a potential strike on America’s enemies abroad. On Thursday, an adviser to Iran’s supreme leader warned in an interview with The Associated Press that any American attack on Iran could set off a “full-fledged war” in the region.

“We don’t welcome war. We are not after starting a war," said Hossein Dehghan, who served in Iran's paramilitary Revolutionary Guard before becoming a defense minister under President Hassan Rouhani.

The concern does not appear to be rooted in anything concrete — Trump has, in fact, ordered a drawdown in U.S. troops in Iraq and Afghanistan to be completed by mid-January — but rather in general nervousness about the unpredictability of Trump’s actions. His firing of Defense Secretary Mark Esper two days after the election triggered a flurry of speculation about whether it was related to a broader plan to strike abroad.

Iraq, where the U.S.-Iran rivalry has chiefly played out, is seen as a potential arena. Frequent attacks against the U.S. Embassy in Baghdad in recent months led a frustrated Trump administration to threaten to close the mission, a move that sparked a diplomatic crisis and diplomatic back channel messaging that led to an informal truce a few weeks ahead of the U.S. election.

With two months to go until a Biden administration takes over, Iranian Gen. Esmail Ghaani, head of the Guard's expeditionary Quds Force, delivered Tehran's request during a meeting with Iranian-backed Iraqi militia factions and Shiite politicians in Baghdad this week, according to two senior Iraqi Shiite politicians who attended the meetings in Baghdad.

The message: Stand down to avoid giving Trump the opportunity to initiate a fresh tit-for-tat round of violence.

And to the Iraqi Shiite paramilitaries: Be calm and cease attacks for now against American presence in Iraq.

However, if there was a U.S. aggression by the Trump administration, Iran's response would “be in line with the type of strike,” one of the Iraqi politicians cited Ghaani as saying.

An Iraqi government official also confirmed Ghaani’s meetings with Iranian-backed factions in Iraq this week. All Iraqi officials spoke on condition of anonymity to discuss the private meetings.

Meanwhile, in Lebanon, the leader of the Iran-backed militant Hezbollah group, Hasan Nasrallah, warned followers and allies to be vigilant during Trump’s remaining weeks in office.

“All of us ... should be on high alert in these next two months so that it passes peacefully,” Nasrallah said in televised remarks earlier this month even as he urged followers to “be prepared to face any danger, aggression or harm” and to respond in kind “if the US or Israel’s follies go that far.”

But only hours after Ghaani delivered Iran's message in Baghdad — and while he was still in Iraq — a barrage of Katyusha rockets were fired at the Iraqi capital's heavily fortified Green Zone, landing a few hundred meters (yards) from the U.S. Embassy. A few of the rockets that landed just outside the Green Zone killed a child and wounded five civilians.

The attack — contrary to instructions to avoid escalation — could indicate potential disagreement within militia ranks, or a deliberate plan by the factions to offer mixed messages and keep their intentions ambiguous.

A little-known militia group, Ashab al-Kahf, believed to have links with the powerful Kataib Hezbollah, claimed responsibility for the rocket attack. For its part, Kataib Hezbollah denied it had carried out the barrage, and claimed the truce initiated in October was still in place.

That claim was countered by Qais al-Khazali, the head of the powerful Iran-aligned Asaib Ahl al-Haq militia group, who said in a televised interview on Thursday that the truce had ended.