11.   Police were Monday hunting the leaders of a gang of hooligans responsible for the worst outbreak of violence at a Dutch soccer match this season.

12.   A last-minute goal annulled by the referee because of offside triggered the worst outbreak of fan violence this season in Swedish soccer.

13.   A statement said it was the worst outbreak of the disease in the last decade and has caused a serious shortage of vaccine worldwide.

14.   At least a dozen people were killed in renewed ethnic clashes this week in the worst outbreak of violence since early March.

15.   If the bombings were election-related, they would be the worst outbreak of violence in what has been so far an unusually peaceful campaign.

16.   If the attacks were election-related, they would be the worst outbreak of violence in what has been so far an unusually peaceful campaign.

17.   It is the worst outbreak of violence in more than a week of disturbances.

18.   It is the worst outbreak of cholera in Zimbabwe for almost a decade.

19.   It was the worst outbreak in decades.

20.   It was the worst outbreak of fighting since the end of the Chechen war.