Which is the correct mechanism for the ozonolysis of an alkyne?

According to *Organic Chemistry* by Jonathan Clayden, Nick Greeves and Stuart Warren (2nd edition), the mechanism for alkene ozonolysis is given as


[![ozonolysis of alkenes](https://i.stack.imgur.com/fEaQ7.jpg)](https://i.stack.imgur.com/fEaQ7.jpg)


In *Advanced Organic Chemistry, Part B: Reactions and Synthesis*, Francis A. Carey and Richard J. Sundberg (5th edition), the ozonolysis of alkene is given as:


[![ozonolysis2](https://i.stack.imgur.com/qfQue.jpg)](https://i.stack.imgur.com/qfQue.jpg)


But mechanism of ozonolysis of alkynes is not given.


[![alkyne ozonolysis](https://i.stack.imgur.com/TOeZn.png)](https://i.stack.imgur.com/TOeZn.png)


What is the correct mechanism of the ozonolysis of alkynes?


