"Prohibited firearms" refers to a category of weapons that are completely banned or illegal to possess, use, or sell in a certain area or jurisdiction. Full definition
Apparently, the hotel prohibits firearms on their premises. (lawyer-monthly.com)
At each entrance, they have a sign prohibiting all firearms and weapons. (law.stackexchange.com)
As we speak, Senator Dino Melaye despite the letter sent to the Senate President as mentioned in Paragraph 5 above, refused to honour Police invitation till date and also refused to appear in court and has also continued to evade the service of criminal summon on him to appear before the Federal High Court, Lokoja on the 28th March, 2018 to answer to the charge of criminal conspiracy and unlawful possession of prohibited firearms against him and Mohammed Audu. (securitykingng.org)