A Suffolk Police spokesman confirmed the force was investigating reports of an assault at the hospital on November 25.
A spokesperson for the Metropolitan Police confirmed the force had received a complaint about G4S which "is currently under consideration".
A West Yorkshire police spokesman confirmed the force was aware of the death and would liaise with the Foreign Office and Pakistani authorities.
Insp Richie Allen, of the dog support unit, has confirmed the force will consider using cats in an as-yet-unspecified role.
A Sussex police spokeswoman confirmed the force had been contacted at 8.45pm on Sunday by a member of the public who had seen a number of men wearing balaclavas and carrying guns.
West Midlands Police confirmed the force was aware of the proceedings.
Dorset Police confirmed the force had made a voluntary referral to the IPCC.
A Lancashire Police spokesman confirmed the force was investigating Mr Neal's complaint.
Hampshire Police Authority (HPA) confirmed the force will move to the site, as well as purchase another building in Winchester City Centre.
Police confirmed the force took away his guns following an incident in 2008, but they were later returned.
