The administrations also expressed their deep condolences to the families of the victims.
According to the BBC, the announcement came in a joint statement as memorial events were held on the 25th anniversary of the tragedy.
The governments of the three countries said they wanted 'all those responsible for the most brutal act of terrorism brought to justice'.
A one-minute silence was broken by a single piper playing the lament Flowers of the Forest.
--ANI (Posted on 22-12-2013)