11.   Both the IRA and pro-British extremists have smuggled in weaponry as part of their efforts to protest conditions or to attempt escapes.

12.   But strong currents made it particularly dangerous for prisoners to attempt escape.

13.   Inmates attempting escape dug a tunnel with steel rods after softening the concrete floor of their cell with urine, guards said Tuesday.

14.   Later, she was too cowed to attempt an escape.

15.   When Van Dan Bosscha and companions attempted an escape via the same road, it had been blocked by a landslide.

16.   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.

17.   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.

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

19.   Authorities have reportedly reinforced security at prisons where MRTA members are being held, fearing they may attempt an escape.

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