Two-metre high waves have hit Chile's northern coast following an 8.2 earthquake in the country.
Officials said the five killed included people who were crushed by collapsing walls or were killed by heart attacks.
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The singer had been tweeting in support of migrants when she was bombarded with abusive messages.
Ministers are reportedly considering plans in a bid to lower inward migration.
In a tweet on Saturday, the US president didn't give a reason for his absence but said he wished"everyone well and have a great evening".