Fathers For Justice campaigners and disgruntled taxi drivers were of high concern.
The London 2012 Olympics was more at risk from taxi drivers and justice campaigners than cyber terrorism, Lord Seb Coe has claimed.
The chairman of the London Olympics committee made the comments at RSA Conference Europe 2013 while describing the various threats organisers had to prepare for.
He explained: "The Games were always predicated as being at a sever threat level – the Games themselves and the immediate buildup. There were obvious contingencies if that ever went to critical."
For the duration of the Games the threat level was not significant, though, he noted.
"You have standard areas of concern around a large event. Obviously the acts of terrorism but there are other risks – terrorism is just one part of the security landscape.
"We had to have plans in place to deal with natural disasters, acts of god, flu pandemics. That’s the nature of security.
"In the end, mercifully, the threats we had to deal with were not at a terrorist level. It tended to be of a domestic nature. You had potential from groups out there, such as Fathers For Justice and taxi drivers who made of have liked the fact they couldn’t use the Olympic lanes.
"That was the level we got to and that’s in large part predicated on robust relationships that were formed."