Additional officers from the Ontario Provincial Police were deployed, doubling the total number of officers to 20,000. Four arrests were made during the twilight of June 27 after two security guards witnessed men emerging from a manhole on Queen Street West. The manholes were later welded shut. About 100 additional arrests were made during a morning raid by Toronto Police Service at the University of Toronto. Those arrested were said to be in possession of black clothing and "weapons of opportunity" such as bricks and sharpened stakes. During the mid-morning, protesters marched from Jimmie Simpson Park on Queen Street East to the front of the Eastern Avenue temporary detention centre, where a "jail solidarity" bike rally and sit-in consisting of about 150 people occurred during the afternoon, with demonstrators urging the release of those arrested the previous day. Following several arrests during the rally, protesters began a sit-in interrupted by small muzzles of pepper spray and rubber bullets fired by police. At least 224 arrests occurred by evening. Another large group assembled at the intersection of Queen Street West and Spadina Avenue, presumably to conduct a protest, but were immediately surrounded by riot police. Numerous bystanders and media personnel were also in the crowd. Several arrests were made, including several members of the media and another CTV cameraman who was briefly held and then released; police later claimed that they had found weapons at the scene, and that they suspected the presence of more black bloc protesters within the crowd. The blockade caused traffic diversions and the stoppage of streetcar service along Spadina Avenue. After several hours of detainment in record-breaking heavy rain, police released the remainder of the crowd during the night. Aftermath Post-summit protests A total of 1118 people were arrested in relation to the G20 summit protests, the largest mass arrests in Canadian history, while nearly 800 of them were released without charge. The remaining 231 people remained with charges before the court while 58 of them have had their charges withdrawn or stayed. Smaller-scale, non-violent protests took place the following day, June 28, during the afternoon and evening. Nearly 1000 protesters marched to Toronto City Hall and Queen's Park to protest the treatment of arrested individuals at the Eastern Avenue holding centre and demanded the release of individuals still being detained, although police had earlier released several arrested on minor charges. Large numbers of Toronto Police