The royal commission probing last December's Bondi terror attack may not hear evidence from an ex-ASIO source with information about the gunmen, as he has been refused an Australian visa.The former undercover agent, known as Marcus, has previously told the ABC that he warned ASIO about Sajid and Naveed Akram six years before the Bondi shooting.The Royal Commission into Antisemitism and Social Cohesion has told Marcus it wants to take his evidence, as it inquires into the actions of intelligence and security agencies in the years before the Bondi attack.A letter sent to Marcus's solicitors from the royal commission was...