Saudi Arabia and Egypt denounced on Sunday's Turkey's decision to send troops to Libya.
They said it was a violation of international law and undermines efforts to resolve crisis in the North African country.
In a statement, the Saudi Foreign Ministry said Ankara's move was a violation of UN Security Council resolutions on Libya.
It also hampers UN efforts to resolve the country's conflict.
Turkey's escalation is a threat to Libya's security and stability.
It also represents a threat to Arab and regional security because. As it is meddling in the internal affairs of an Arab country, it went on to say.
Meanwhile, Egypt's Foreign Ministry informed the ambassadors from Europe and the United States in Cairo that Ankara's move was a "flagrant" violation of international laws and Security Council resolutions.
It emphasized resolution 1970, issued in 2011, that imposed an arms embargo on Libya.
Foreign Ministry officials warned that Turkish military intervention would impede the comprehensive settlement in Libya and destabilize the Mediterranean region.
Cairo worked hard to achieve security and stability in its region. It also calls on the international community to immediately assume its duties in preventing an escalation.
Turkish President Recep Tayyip Erdogan said Sunday that the country was deploying military units to Libya. It's also where Ankara is supporting the Government of National Accord (GNA) in Tripoli.
Turkey's parliament also authorized the deployment of troops to Libya on Thursday. This comes after a separate deal on sending military experts and weapons signed into law in December.
He said Turkish soldiers were tasked with "coordination" at a command center.
"The Turkish armed forces not to fight, but to ensure a ceasefire in Libya" while supporting GNA, Erdogan said.
The GNA and Turkey signed security and maritime agreements in November last year, angering Mediterranean countries including Greece and Cyprus who also seek to exploit energy resources in the region.
