 Complete the following phrase:  In April 2011, the Telegraph reported that a surveillance team from the SRR had spent three weeks tracking a cell of 4 men belonging to the Óglaigh na hÉireann ONH-a dissident Irish republican paramilitary group operating in Northern Ireland made up of members who split from the Real IRA. The SRR members who were reportedly working for Scotland Yards Counter Terrorism Command watched the men, who photographed key roads and buildings in London, including the Olympic Stadium. Intelligence suggested that ONH and other dissident Republicans were not aiming to launch mass-casualty attacks but continue to target police and military targets. One source said the unit was not thought to have the capability of launching a terrorist attack on mainland Britain, although some dissidents have that capacity. The cell was not thought to be targeting the 