Pakistan-Saudi-Turkiye pact.

It's a NATO-style pact under which an attack against one will be treated as an attack against all three. Recep Tayyip Erdogan of Turkiye, Saudi Crown Prince Mohammed bin Salman and Shehbaz Sharif of Pakistan signed the trilateral agreement in the holy city of Mecca yesterday. 

Pakistan and Saudi Arabia already have a bilateral defence pact.

The trilateral defence agreement was signed a day after Iran said it was in the final stages of an agreement with Oman on a framework for shipping through the Strait of Hormuz. An Iranian lawmaker had said the trilateral "paper agreement" will not bring security.

India is watching the fall out and further developments.