Russia and Iran, which back Syrian President Bashar Assad, and Turkey, which backs rebels in Syria, have agreed that there must be an immediate end to “hostilities”, Russia’s foreign minister said on Saturday Sergei Lavrov during a meeting in Doha.

Speaking at the annual Doha Forum, Lavrov said Moscow continues to help the Syrian army confront the rebels.

“We are very sorry for the Syrian people who have become the object of another geopolitical experiment,” he said, blaming the United States and the West for what is happening in Syria. “We are doing everything we can to prevent terrorists from gaining the upper hand, even if they claim they are not terrorists.”

Lavrov was referring to Hayat Tahrir al-Sham, an Islamist group leading the latest campaign against Assad.

The group was designated a foreign terrorist organization by the United States in 2018 and was previously affiliated with Al Qaeda, another U.S.-designated terrorist organization.

“It is unacceptable to allow the terrorist group to take control of land in violation of existing agreements, starting with UN Security Council Resolution 2254, which forcefully reaffirmed sovereignty, territorial integrity and “unity of the Syrian Arab Republic,” Lavrov said.

Lavrov said Russia wanted to see a dialogue between the Syrian government and what he called the “legitimate opposition” in Syria.

Asked if he thought current events threatened Assad’s regime, Lavrov replied: “We are not in the business of guessing what will happen.”