US university chief quits in race row

The president of the University of Missouri has resigned amid accusations that there is endemic racism at the university that is not being addressed.

Tim Wolfe made the announcement as students and professors staged a walkout at the Columbia campus.

Some members of the university's football team have threatened not to play at a game on Saturday over the racial issues.

Black student groups say racial slurs are commonly used around campus.

"The frustration and anger that I see is clear and real and I don't doubt it for a second," said Mr Wolfe.

"I take full responsibility for the frustration and inaction on this campus."

Missouri graduate student Jonathan Butler, who had been participating in a hunger strike as a protest, said the resignation was a "great step towards change" but there was still a lot of work to do.

The university's governing board must consider minority voices to avoid situations like this in the future, Mr Butler told CNN.

"We still have a lot of healing that needs to happen on campus," he said, adding that his hunger strike would now end.

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Reaction on social media

Rather than jubilation, the main sentiment was disappointment and frustration - at least if you looked at Yik Yak.

• "I need to transfer," said one user.

• "I guess we will now see if the protesters are happy or not," said another. "I wonder how long it will be until there's another big protest."

• Another said sarcastically: "Thank god Tim Wolfe resigned! Racism is no longer a thing."