Deakin University's counter-terrorism expert Greg Barton tells 7.30 it's very likely the attackers were inspired by Islamic State, but mercifully they failed to mount an attack on the scale of the atrocities in Paris in November.<br><br>He says we can expect increasingly coordinated attacks in the region, saying "the attacks of the last 12 years have been bumbling and ineffectual and Indonesian police have been well up to the challenge", but the threat is increasing across SE Asia.<br><br>"Indonesia has dealt with a resilient threat and kept on top of it — that threat has now scaled up with the arrival of Islamic State."