UK and EU leaders appear to have hardened their positions on reopening Brexit negotiations, throwing more doubt on any breakthrough before the October 31 deadline.

European Council President Donald Tusk has rejected British Prime Minister Boris Johnson's latest demands to get rid of the so-called "Irish backstop" provisions in the current withdrawal agreement.

The backstop would prevent border checks between Northern Ireland and the Republic of Ireland.

Tusk says Johnson has not presented any viable alternative, so there is nothing to re-negotiate.

Al Jazeera's Laurence Lee has more from Dundalk, near the Irish border.

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