Turkey brought forward troop deployment to Qatar on Wednesday and pledged to provide crucial food and water supplies to the Gulf Arab country facing a worsening rift with its powerful Middle Eastern neighbors.
In the deepest split between Arab states for decades, Saudi Arabia, Egypt, the United Arab Emirates (UAE) and Bahrain severed relations with Qatar on Monday and closed their airspace to commercial flights, saying it was funding militant groups.
Qatar vehemently denies the accusations.
Turkish President Tayyip Erdogan has said isolating Qatar would not resolve any problems. Erdogan, who has long tried to play the role of a regional power broker, said Ankara would do everything in its power to help end the regional crisis.
Lawmakers from Erdogan's ruling AK Party and the nationalist opposition MHP were the main backers of the bill that allows troops to be deployed to Turkey's base in Qatar, but the main opposition CHP party said the timing sent the wrong message.
"With these agreements, Turkey is making a choice and by standing by Qatar it is taking on the other countries. This is a wrong policy," CHP deputy head and lawmaker Ozturk Yilmaz said. "How will you be a mediator if you are taking sides?" he said.