Remanded activist planned to confront Obama Police arrest a G20 protester wearing an Anonymous mask. Photo: Scott Paterson A notorious Brisbane activist arrested for breaking his ban on entering the G20 security zone has been remanded in custody. Mitchelton man Ciaron O'Reilly, 54, was grabbed by police walking across Cordelia Street towards the Convention and Exhibition Centre about 3pm Saturday. He had already been declared a prohibited person on Thursday. Police were even present on the water. "My intentions from the beginning were to non-violently confront President Obama on the persecution of the Queenslander Julian Assange ... and also Chelsea Manning," Mr O'Reilly said before his arrest. They [police] say I'm a prohibited person...I don't think any event is worth staging where you suspend our universal human rights. Four other people were arrested during protests on Saturday. Police form a wall on the streets on Saturday as G20 leaders meet in Brisbane. The first was a 25-year-old woman from The Gap, charged with possession of prohibited items after being stopped and searched at the BrisCan rally in Roma Street Parklands just before midday. Police allegedly found a gas mask, a leatherman knife and a large red-and-black coloured protest banner among her possessions. "It's ridiculous, I'm being charged over a multi-tool," she said as she was taken away in a police van. Security check vehicles near Roma Street. The woman's friend, a 20-year-old woman also from The Gap, was initially let go with just an exclusion notice. But police confirmed on Saturday evening that she had crossed back into the restricted area and been arrested and charged with trespassing. A 44-year-old Dinmore man was also arrested at North Quay and given an exclusion notice for allegedly wearing a Guy Fawkes mask on his face. Police investigate the discovery of gas masks, Photo: Renee Melides All three will face Brisbane Magistrates Court on December 4. Another man was handed an exclusion notice after being pulled up by police while filming on Elizabeth Street, claiming to be filming a documentary about the MH17 tragedy. It brings the total number of arrests so far across the G20 to 11, and the total number of exclusion notices issued to 19. The Queensland Police Service defended the number of officers involved securing Brisbane for the G20, after the quieter-than-expected day of protests. Local numbers have been boosted by officers from around Queensland and interstate, with more than 6000 on duty. QPS Assistant Commissioner Katarina Carroll said said she didn't think it was "overkill." "Police are not only there to protect the protesters, they're also there to protect the rest of the public, to keep the protesters on a certain route," she said. It's actually for a bigger picture of what we do out there. Assistant Commissioner Ross Barnett said the relative calm was indicative of proper planning and resourcing. "This outcome is no accident, and reflects the goodwill and trust between both sides," he said. It was pleasing to hear the acknowledgment of the professionalism of the police negotiation and protest management as a template for best practice by [prominent civil liberties campaigner] Terry O'Gorman, who was part of the Legal Observers program. Assistant Commissioner Carroll admitted there were cases of protesters wearing the Anonymous-associated Guy Fawkes masks on the backs of their head, but not being pulled up. "We've always said we're going to be reasonable and tolerant here," she said. If the crowd's well-behaved, it's lawful, it's peaceful, there is a level of tolerance that we're going to expect and that was obvious today. Seven protests are planned for Sunday, most in the inner-city. Assistant Commissioner Carroll said the forecast top of 40 degrees in Brisbane was "extraordinarily concerning," but crowd management and security arrangements would follow the same plan. "The conditions are going to be a lot more difficult, not only for police but also protestors," she said. You might see smaller numbers because there are less groups.