We're still in the investigation stage at this point.

BBC: Boston explosions: Obama statement

Mr. Botha defended himself against Mr. Roux's charges by stressing the investigation was still in preliminary stage.

WSJ: Lead Detective in Pistorius Case Pulled, After Facing Charges

Mr. Suljic hasn't been charged with any crime because Mr. Di Martino's investigation is still in the preliminary stage.

WSJ: Soccer-Fixing Probe Nets Arrest

The ongoing US government investigation alleges that the scheme began in Europe and later spread to the US, where at one stage more than 190 computers belonging to America's Nasa space agency were infected.

BBC: Europeans charged in US over destructive computer virus

We've assembled a mishap investigation team that immediately was assembled upon the point of past the stage in which the orbiter was to have landed here at Kennedy Space Center, a little after 9:30.

CNN: O'Keefe: 'A tragic day for the NASA family'

But at this stage, without being able to review evidence collected in an ongoing investigation, we will not prejudge the actions of any individual.

CNN: Blackwater defends team in Baghdad shootings