Nine men and two women, aged between 21 and 72, were detained under the Terrorism Act on Friday morning as part of operations in Omagh and Coalisland.
Welcoming the development, the South Antrim MLA said:
“This would appear to be a significant step forward in the hunt to identify those responsible for this barbaric act and bring them to justice.
Although we were pleased to see DCI Caldwell make his first public appearance since the attack earlier this week, the reality is that his injuries are life-changing and the attempt on his life will have a profound impact on him and his family.
Subsequently, those who planned and perpetrated this terrorist act must not be allowed to rest easy in their beds. For those who would seek to target more of our police officers and consign our communities to a cycle of mindless violence and division, there can be no business as usual.”