Turkey’s Foreign Ministry said the leak of a meeting where top officials discussed a military incursion into Syria was a “heinous attack” on national security, and authorities blocked YouTube to prevent access to the recording.

The Foreign Ministry in Ankara said in a statement that the meeting, attended by Foreign Minister Ahmet Davutoglu, the head of national intelligence and other military and diplomatic officials according to the tape, was a natural response to threats to an enclave of Turkish territory inside Syria. It said some sections of the tape were “distorted.”

The purported recording included Davutoglu allegedly discussing an attack against Islamist militants who have threatened the tomb of Suleyman Shah, a monument that’s on Turkish territory inside Syria under international agreements. There was no way to independently verify the authenticity of the recording or when it was made.

Turkey’s telecommunications authority said it has blocked access to YouTube, where the recording appeared, without citing a reason.