Australian Peter Greste among Al Jazeera journalists held in Egypt Australian journalist Peter Greste is being held in solitary confinement without charge. THE parents of an Australian journalist being held in solitary confinement in Egypt say they're worried their son could be held without charge for two years. Overnight Egyptian authorities announced that Peter Greste was one of 20 journalist who worked for Al Jazeera and may face trial on terrorism charges. Authorities have yet to release a trial date or release the names or charges of the journalists but Mr Greste is reportedly included. He was one of three men arrested on December 29 in a raid on hotel suites in Cairo where they had been working. This morning Mr Greste's parents Lois and Juris said they hadn't spoken to their son since last Friday and had reached "breaking point." "Both Lois and I have had the most harrowing, the most stressful and difficult four weeks of our lives," Mr Greste said. (Peter is in solitary confinement) clearly for punishment not mere detention. This is most undeserved, outrageous and shameful," he said. The Greste's said no charges have been formally laid against their son. Lois and Juris Greste respond to news that their son may stand trial in Egypt on terrorism charges. Peter Greste is believed to have been arrested because Egyptian authorities believe Al Jazeera is biased towards ousted Egyptian President Mohamed Morsi and the Muslim Brotherhood. The government declared the Brotherhood a terrorist organisation last month. We are absolutely confident that the broadcast material did not contain any falsity, inflammatory or (inciting) material. "It seems to us this is an outrageous case of shifting goalposts," Mr Greste said. Peter Greste has had his detention period extended twice under the guise of his work equipment being investigated, his parents said. Mrs Greste said they hadn't spoken to their son since 2am last Friday morning when his last review was held. She said they were not able to speak to him during an appeal that was held in court last night. "He seems to be holding up well," she said. Breaking point ... Lois and Juris Greste have had "the most harrowing four weeks" of their lives." Mrs Greste said Australian Foreign Minister Julie Bishop "had a long phone call" with the Egyptian Prime Minister and she was satisfied with the help and communication the Australian government had offered the couple. The Greste's said they have no plans to travel to Egypt to be closer to their son. "Cairo seems to be in such a turmoil that it would probably be more useful for us to work from this end," Mrs Greste said. They said their greatest fear was their son would be held in jail indefinitely. "I think Peter will find ways to cope, he's a very strong character and hopefully he will find ways to handle it, the solitary," Mrs Greste said. "The nightmarish thought for me is that on the basis of the current laws in Egypt he could be held this way for up to two years and our understanding is some people have been," Mr Greste said.