Officials said the man did not appear to be targeting Trump or others involved in the trial
"The United States will fully support all efforts to bring to justice those responsible. Our assessment is unchanged - MH17 was shot down by a surface-to-air missile fired from separatist-controlled territory in eastern Ukraine,” National Security Council spokesman Ned Price said in a statement.
“The victims and their loved ones remain in our thoughts and prayers."
Earlier on Tuesday, Dutch investigators said the aircraft was shot down over Ukraine by a Russian-built Buk missile.
But the report did not assign blame for the crash on July 17, 2014, which killed 298 people.