11.   Authorities in Serbia warned students today against joining the strike.

12.   DLP spokesman Sohn Hak-kyu on Saturday warned students against violence and accused the opposition of instigating them for political gain.

13.   He also warned IAIN students about some people who kept trying to set up an Islamic state in Indonesia in the same way as the banned NII movement.

14.   He also warned the students against taking their protests onto the streets.

15.   He also ordered Belfour to visit two area high schools within the next two years to warn students about alcohol abuse.

16.   President Nelson Mandela has warned the students against unlawful acts during their protests.

17.   Some Palm Beach County math teachers said they discovered the problem before the test and warned students.

18.   The education minister, Gerasimos Arsenis, warned protesting students this week that they could fail the year unless they immediately return to classes.

19.   The education minister, Gerasimos Arsenis, had warned protesting students they could fail the year unless they immediately return to classes.

20.   The education minister, Gerasimos Arsenis, warned protesting students they could fail the year unless they immediately return to classes.