ISIS Attack on US Colombo Embassy?

The  Srilankan Police  did not receive  any intelligence   report that the ISIS is planning to hijack a aeroplane from Ratmalana airport  and launch the attack on the US Colombo Embassy. Police Spokesman SP Ruwan Gunasekera said, that they were unaware about such a plot. However, a group of US Intelligence officers reported to have been  arrived in Sri Lanka to probe on the matter.. He further  said , the intelligence unit might have received such information.  Sri Lanka Air Force (SLAF), its Spokesman Group Captain Gihan Seneviratne  is tight lipped on this matter. However the security at the Ratmalana Air Base said to have been tightened.