TORONTO -- The family of an Egyptian-Canadian journalist who has now been held in a Cairo prison for 100 days says the man is getting "fed up" at being held on a "ridiculous" set of charges.

Mohamed Fahmy was working for Qatar-based satellite news broadcaster Al-Jazeera English when he was arrested on Dec. 29 along with his colleagues -- Australian Peter Greste and Egyptian Baher Mohamed.

The trio are being tried along with 17 others in what's thought to be the first time journalists have been charged with terrorism-related offences in Egypt.

Fahmy's brother says the 40-year-old is frustrated at how slowly the trial is progressing and how his requests for bail keep being turned down.

Journalists around the world are marking the Al-Jazeera trio's 100 days behind bars by calling for their release on social media and through gatherings in London and New York.

Fahmy's trial resumes in Cairo on April 10.