"Several journalists have been attacked and injured during the military crackdown on protestors in Egypt.
The International Press Institute's executive director, Alison Bethel McKenzie, said: "The supreme council of the armed forces should ensure that Egyptian soldiers stop harming or detaining journalists covering the anti-military protests.
"As clashes reportedly continue, it is fundamental that journalists be allowed to do their jobs and report on events without fear of attacks."
On Saturday, the Egyptian Syndicate of Journalists said two journalists had been detained by military police, while a further ten had been injured.
Other journalists had their equipment confiscated or broken, or had photos deleted.
Ahram Online reported that its reporter, Ahmed Feteha, "was robbed and beaten twice while covering a standoff between protesters and police in downtown Cairo".
Al Masry Al Youm video journalist Ahmed Abdel Fattah was hit in the eye with a rubber bullet while covering clashes near Tahrir Square on Saturday.
In Alexandria, journalists from the newspapers El-Akhbar, El-Shorouk, El-Tahrir and the MENA news agency were attacked.
According to one report, a journalist who was detained, was forced to strip, blindfolded and beaten with a wooden stick."