11.   And they decided to free their hostages after authorities agreed to speed up trials and transfer the leaders of rioting prisoners elsewhere.

12.   The rioting prisoners were armed with several grenades and pistols, which suggests they had help from prison staff, the source said.

13.   The rioting prisoners had tapped into a huge stock of tranquillizers delivered to the prison shortly before the riot broke out Tuesday.

14.   The source said the rioting prisoners were armed with several grenades and pistols, which they had obtained with help from staff inside the prison.

15.   Rioting prisoners in a northern Colombia prison took officials hostage Thursday, and at least three people have been killed, police said.