President Barack Obama has vowed that the US will not "leap before we look" in response to Syria's alleged use of chemical weapons.
At a press conference, as part of a visit to Costa Rica, Obama said he does not foresee a scenario in which he would dispatch US troops to Syria.
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The inquiry's most senior lawyer is said to be considering stepping down after disagreeing with its chairwoman Alexis Jay over its future.
The tennis superstar said she was being driven by her nephew when she saw a police officer and was worried about what might happen.
A team of prosecutors investigating the downing of a Malaysian airliner over eastern Ukraine in 2014 is due to release new findings today.