Republican presidential candidate Donald Trump appears to have softened his stance on temporarily barring Muslims from travelling to the US.

Responding to remarks by London Mayor Sadiq Khan, Mr Trump told Fox News Radio the ban was "just a suggestion".

Mr Khan has expressed concern that he would not be able to travel to the US under a Trump administration because of his Muslim faith.

Mr Trump had offered to make an "exception" for Mr Khan.

Mr Khan refused Mr Trump's offer, saying the New York businessman's views were "ignorant" and would make the UK and the US "less safe".

Mr Trump proposed a ban on Muslims entering the US after attacks in Paris killed 130 people last year.