An eminent counterterrorism expert, Prof Rohan Gunaratna, said that the Islamic State (IS) no longer has the capability to mount a large-scale attack on Sri Lanka as 95 per cent of its network in the country has been dismantled by the security forces since the Easter Sunday carnage. Based in Singapore, he is a Professor of Security Studies at NTU who had co-authored the book “The Three Pillars of Radicalisation: Needs, Narratives and Networks”, among others.