21.   In recent months, beside attempting mass escapes, Vietnamese inmates have also staged sit-in protests, setting their huts ablaze and carrying out roof-top protests.

22.   In recent months, Vietnamese inmates in Hong Kong camps have staged several protests, setting their huts ablaze, attempting mass escapes and carrying out rooftop protests.

23.   In recent months, Vietnamese inmates have staged several protests, setting their huts afire, attempting mass escapes and carrying out rooftop protests.

24.   Authorities in Hong Kong foiled a new mass escape attempt by a group of Vietnamese boat people Tuesday, firing volleys of tear gas to quell rioting.

25.   But in recent months, Vietnamese inmates have staged several protests, setting their huts on fire, attempting mass escapes and carrying out rooftop protests.

26.   During their five months in Panama, the boat people staged five mass escape attempts.

27.   The turncoat Sinacori had already informed police of a planned mass escape from Palermo prison of mafia chiefs, using explosive to breach the walls.

28.   Two other prisoners at Modderbee jail near Johannesburg were killed during rioting and a mass escape on Thursday.

29.   US troops tightened security since riots and a mass escape attempt last month.

30.   It said the mass escape occurred last June.