Pro-government fighters were expected Monday to enter Syria's Afrin after talks with Kurdish forces, in a move that could pave the way for a settlement in a month-old Turkish assault on the northern enclave.
"Popular forces will arrive in Afrin within a few hours to support its people's stand against the Turkish regime's attack on the area and its people," state news agency SANA said, citing its correspondent in Aleppo.
SANA said the forces would "join the resistance against the Turkish aggression".
"This comes in the framework of supporting residents and defending the territorial unity and sovereignty of Syria," the agency added.
Even hours after the announcement, AFP correspondents on the outskirts of Afrin did not see any military forces arriving, although state media was present.
The Syrian region of Afrin, which borders Turkey, is held by the Kurdish People's Protection Units (YPG) and has faced a month-old assault by Ankara and allied Syrian rebels.
Turkey sees the YPG's presence on its southern border as a direct threat, and observers have noted it would be more comfortable with a regime force deployed there.
The Afrin operation, dubbed "Olive Branch," has seen Ankara deploy ground troops and pound the region with air strikes and artillery fire, including on Monday.
YPG spokesman Birusk Hasakeh could not immediately confirm the deployment of regime-affiliated forces on Monday.
Syrian government forces withdrew from Kurdish-majority areas across the country's north in 2012, paving the way for Kurdish authorities to implement de facto self-rule.
But negotiations have been ongoing for a potential return of government-affiliated forces to the enclave, officials have said.
Heve Mustafa, the co-chair of Afrin's executive council, told AFP on Sunday that talks on the subject were ongoing.
"These talks are happening on the military level," she said.
- 'No problem' with forces -
Last week, YPG chief Sipan Hamo told journalists his forces would have "no problem" with Damascus intervening to help repel Turkey's assault.
"We don't have a problem with the entry of the Syrian army to defend Afrin and its border in the face of the Turkish occupation," Hamo said.
But Kurdish officials have remained vague on what kind of regime deployment they would accept in Afrin.
Mustafa's co-chair in Afrin, Othman Al-Sheikh Issa, told AFP last month that Damascus should intervene to stop Turkish warplanes flying overhead.
State media did not elaborate on the make-up of the "popular forces" due to enter Afrin on Monday and made no mention of regular army troops being deployed.
Damascus has denounced Ankara's "aggression" but until Monday had not explicitly said it would intervene.
Turkey and allied rebels launched the offensive on January 20 in a bid to clear the YPG from territory along the border.
The assault has brought to the surface the complex and competing interests of world powers embroiled in Syria's seven-year conflict.
Turkey has backed Syrian rebels to fight government troops, jihadists, and the YPG.
Ankara sees the YPG as a "terror" group and the Syrian arm of the outlawed Kurdistan Workers Party (PKK), which has fought a decades-long insurgency against the Turkish state.
The United States -- Turkey's NATO ally -- has allied with the YPG elsewhere in Syria, providing it with arms and other support to fight the Islamic State jihadist group.
Regime ally Russia had also directly supported the YPG in Afrin, training Kurdish forces there before withdrawing as Turkey announced its assault last month.
On Monday, Turkish President Recep Tayyip Erdogan and his Russian counterpart Vladimir Putin discussed the Afrin offensive in a phone call, the Kremlin said, without giving details.
The contact came as Turkey said it would rather see regime troops in Afrin than the YPG.
"If the regime is entering (Afrin) to oust the PKK, YPG, there is no problem. But if they are entering to protect the YPG, then no one can stop us and Turkish soldiers," Foreign Minister Mevlut Cavusoglu said.
Cavusoglu said the aim of the operation was "clear" and aimed at "removing terrorists" from its border.