Footage has been released showing the extensive damage wreaked by a tornado in the US state of Kansas.
There are reports of "mass casualties" in the neighbouring state of Arkansas, while local media also say two people have died in the town of Quapaw in Oklahoma.
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Singer posted on Facebook that she had taken an overdose and hidden in a hotel.
After decades of struggling negotiations both activists and delegates are hoping for some form of landmark agreement.
World Rugby chairman Bernard Lapasset led the tributes, calling Lomu 'a giant' of the game.