Morning top 5: Trump v Clinton; Taoiseach in Brussels; Mosul battle rages on

The headlines this Thursday morning...

Donald Trump has refused to say that he will accept the result of the United States election.

When pressed by the moderator of the third and final presidential debate to confirm that he will accept the outcome of the vote, he said: "I will look at it at the time."

Hillary Clinton described her rival's refusal to endorse the electoral process as "horrifying".

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Taoiseach Enda Kenny is travelling to Brussels today to join heads of state and government at an EU summit.

UK Prime Minister Theresa May will also be in attendance to discuss British plans for Brexit.

Sources say there is sympathy among EU leaders for unique position faced by Ireland following the UK referendum. 

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Changes to the help-to-buy scheme included in Budget 2017 are expected to be announced today.

Concerns have been raised that the package, which is aimed at getting first-time buyers on the property ladder, will increase house prices.

The Finance Bill due to be published today will give legislative effect to the budget tax changes outlined last week.

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US-trained Iraqi special forces have strengthened the offensive on the Islamic State-held city of Mosul.

A huge convoy of its elite Golden Division has arrived at positions hard won by Kurdish Peshmerga forces at the start of the week.

The unit is tasked with entering and taking the county's second biggest city.

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A European space probe has landed on the surface of Mars on a mission to look for signs of life.

However, scientists are still waiting for confirmation on Schiaparelli's condition after a six-minute descent using a heatshield, parachute and rocket boosters to slow it down from 13,000mph.

The ExoMars mission's main objective is to look for signs of life on the Red Planet.