The Prison Service said all its prisons run a "safe and secure regime" after disturbances broke out at two jails yesterday.
A spokeswoman said:
All our prisons run a safe and secure regime and are staffed appropriately.
We are currently introducing reforms to the prison system that will provide better value for taxpayers while protecting the public and improving the chances of prisoners being rehabilitated.
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Colo became a mother of three, grandmother of 16, great-grandmother of 12 and great-great-grandmother of three.
The district's director of homeland security has said officials are planning for 800,000 to 900,000 people to attend the ceremony.
The Supreme Court is set to decide on whether disabled travellers are legally entitled to have priority use of wheelchair spaces on buses.