Umno information chief Shahril Hamdan has questioned some arguments used to defend Kuala Langat MP Dr Xavier Jayakumar's decision to quit PKR and support Perikatan Nasional (PN).

In particular, he questioned those claiming that Xavier jumped due to pressure and threats.

"If he is really not guilty, no matter the 'threats', why the need to jump?

"Now that he has jumped, will the investigations come to an end?" Shahril asked.