Cairo: Egyptian riot police are firing made in USA tear gas canisters against street demonstrators.

Protesters provided ABC News with pictures of the canisters that were recovered from Tahrir Square

Israel's military on Monday sought to cast doubt on reports that tear gas fired by its troops caused the death of a Palestinian protester, prompting fierce rebuttals from activists.

Jawaher Abu Rahma died overnight Friday after inhaling massive amounts of tear gas at a demonstration against Israel's separation barrier, according to Israeli and Palestinian activists and staff at a Ramallah hospital.