Three journalists from the Qatari Al Jazeera television network appear before an Egyptian court on terrorism-related charges.

Their appearance on Saturday was short-lived as the judge put back their trial until May 15th.

All three, an Egyptian, an Egyptian-Canadian and an Australian, are charged with aiding members of a terrorist organisation.

That's a reference to the Muslim Brotherhood, main backers of ousted President Mohamed Mursi.

Advocates for the journalists say Al Jazeera's being targeted because Egypt accuses Qatar supporting Mursi.

Outside the court the brother of Australian defendant Peter Greste expressed frustration that he's still detained.

(SOUNDBITE)(English) ANDREW GRESTE, PETER GRESTE'S BROTHER, SAYING:

"I guess it's ironic that we're here in court for Peter's trial on World Press Freedom Day. We've seen another adjournment so it's getting increasingly difficult for us as a family and all the guys inside to, you know, endure