21.   The ban was used by the government to keep prices low in hopes of forestalling further food riots.

22.   The resignation letter, which was delivered to Congress late in the day, followed food riots and protests here and in several cities.

23.   There has not so far been an explosion of food riots or riots by unemployed workers.

24.   There are, however, food riots.

25.   These increases have triggered dozens of food riots around the country.

26.   Palestinian leader Yasser Arafat warned, in an interview broadcast Friday, that the six-month Israeli blockade of the Palestinian areas could cause food riots.

27.   Perez promised a return to the days of subsidies, then abruptly imposed free-market changes that provoked food riots in which hundreds died.

28.   After his failed austerity plans inspired deep popular anger, De la Rua resigned Thursday following two days of protests, food riots and supermarket looting.

29.   Britain moved Wednesday to mend relations with Zimbabwe hurt by a controversial plan to seize white-owned farms and food riots that shook the confidence of British investors.

30.   De la Rua stepped down after two days of street protests, food riots and supermarket looting.