11.   As violence intensified, rioters attacked police with firebombs.

12.   But in recent weeks, violence has intensified.

13.   Clinton met with Prime Minister Ehud Barak last night amid concerns that the violence is intensifying.

14.   Clinton met with Prime Minister Ehud Barak on Sunday night amid concerns that the violence is intensifying.

15.   Ethnic violence in Kosovo intensified in November, claiming the lives of a Serb policeman and four ethnic Albanians and leaving several others wounded.

16.   Ethnically motivated violence in Kosovo intensified in November, claiming the lives of a Serb policeman and four ethnic Albanians and leaving several others wounded.

17.   His comments came amid new fighting in Kosovo, where violence has intensified in the past six months.

18.   Hundreds of ethnic Albanians from around Tanusevci fled to Kosovo last week, when violence first intensified.

19.   Hundreds of ethnic Albanians from the Tanusevci region fled over to Kosovo last week, when violence first intensified.

20.   Many fear that the violence will intensify ahead of the summer elections.