Mo Farah has claimed his Great Britain team-mate Andy Vernon questioned his nationality after the double Olympic champion won European 10,000 metres gold last summer.
Farah made the claims when he was questioned on Friday about a Twitter spat the pair had earlier in the week.
The 31-year-old, who was born in Mogadishu in Somalia before moving to Britain as a child, has apologised for the social media row, but admitted their past contributed to his frustrations boiling over.
Vernon has admitted making the comments in Zurich, but insisted they were intended as "a joke" among a group of people "having a laugh" saying:
I said it on a table full of people and we were all having a joke at the time. We had just raced and the team was all in high spirits. The whole table was having a joke and a laugh and it was just a comment to carry on the jokes. He laughed at the time. If he did take it out of context it wasn't meant that way and I apologise.
Tracey Cramond, who was running for the Butterwick Hospice in memory of her mother, was named as the millionth runner to take part in the event.
She said that as she crossed the finish line, "I heard a bang go off behind me...and then I got mobbed!"
Tracey was presented with a special award by Lord Coe.
A charity runner became the millionth person to finish the Great North Run in Newcastle.
Tracey Cramond crossed the line with a time of just over three hours and 22 minutes becoming the first millionth finisher ever in a running event worldwide.
She was in a mass of runners who surged through the line an hour and 22 minutes after race winner, the double Olympic gold medallist Mo Farah.
She told the BBC: "I'm absolutely gobsmacked - totally shocked," adding that she started running last year after her mother died.
She added: "I thought I would raise funds for children's charities because children meant so much to her."
A half-marathon personal best for Mo Farah and a new women's record, set in this year's Great North Run.Read the full story ›
Olympic champion Mo Farah has celebrated becoming the first British man to win the Great North Run since 1985 by beating Mike Kigen with a personal best time of one hour and one second.
Olympic, World and European champion Mo Farah made up for last year's heartbreak by winning the Great North Run in Newcastle.
The 31-year-old who lost in a sprint finish to Ethiopia's Kenenisa Bekele over the half-marathon course 12 months ago, scored a personal best time of 1:00:01.
Kenyan distance runner Mary Keitany has won the women's elite event at the Great North Run, with a finishing time of 65 minutes, 39 seconds.
Britain's Gemma Steel claimed second place.
Great Britain's Mo Farah won his second gold medal of the European Athletics Championships as he powered to victory in the men's 5,000m.
Farah also won gold in the men's 10,000m race in Zurich on Wednesday.
Olympic champion Mo Farah has won another gold medal for Great Britain, battling through driving rain to claim first place in the men's 10,000 metres at the European Championships.
The star runner went into the lead with 600m left on the track, making a final push to surge clear in the final 60m.
And it was a double celebration for the British team as Farah was followed by Andy Vernon to claim the silver, having managed to overtake Turkey's Ali Kaya in the last few metres.
The win helped bring a smile back to Farah's face in what has been a tough competitive year for the athlete.
He collapsed part-way through the New York half-marathon, finished a disappointing eighth in the London Marathon, and was unable to compete in the Commonwealth Games in Glasgow due to a tooth infection.