The UK has announced it is withholding £21 million of aid to Rwanda, due next month.
The UK says it is concerned it is supporting rebels in the DRC. Consecutive UK Prime Ministers have praised Rwanda's leadership.
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Michael Fallon has received reassurances from his US counterpart that security ties with Britain will "endure" following a vote for Brexit.
On Friday, police said it appeared the girl had shot herself in the face with the weapon.
The showers will be slow-moving, heavy and thundery at times, particularly in central and eastern areas.