Morning top 5: Obama backs Clinton; Turkey's media crackdown; and US Zika fears

The top stories this Thursday morning...

President Barack Obama has asked voters to reject cynicism and fear, and give their full support to Hillary Clinton to succeed him in the White House.

He defeated her for the Democratic nomination eight years ago, but last night backed Mrs Clinton to become the first ever female president of the United States.

Mrs Clinton joined Mr Obama briefly on stage at the end of his speech at the Democratic National Convention overnight.

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A media crackdown by Turkish authorities has seen the closure of 16 TV stations and 45 newspapers.

It follows the failed military coup in the country earlier this month.

Dozens of journalists have been detained, with arrest warrants issued for many more.

The media closures are paving the way for the introduction of Islamic Sharia law, according to human rights experts.

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French media outlets have agreed to stop publishing photos and names of terrorists.

The decision is aimed at preventing killers from being inadvertently glorified.

More questions are being asked about French security services after the latest terror attack there.

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The National Transport Authority (NTA) is defending the decision to carry out essential LUAS works in Dublin this Bank Holiday weekend.

Major traffic diversions are being introduced in the Capital from 8.00pm on Friday night until 6.00am on Tuesday morning - with the closure of the city's north and south quays at O'Connell Bridge.

The NTA says the work is vital and it has to be done this weekend.

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Authorities in the US state of Florida say they are investigating four possible cases of the Zika virus which are not related to travel.

It raises the possibility that the disease is now being transmitted by local mosquitoes.

Health officials had previously announced two cases were being looked into, but they have now identified two more.