Story highlights Authorities say two Boston brothers beat a homeless man because he was an "illegal immigrant."

Trump says he "would never condone violence"

(CNN) Republican presidential front-runner Donald Trump said Friday he "would never condone violence" after Boston police said two men beat a homeless man while making anti-immigrant statements.

"Donald Trump was right," the two men said, according to police, as they beat the man with a metal pipe and then urinated on him. "All these illegals need to be deported."

Trump tweeted on Friday that the incident was "terrible."

"We need energy and passion, but we must treat each other with respect," Trump said.

Boston incident is terrible. We need energy and passion, but we must treat each other with respect. I would never condone violence. — Donald J. Trump (@realDonaldTrump) August 21, 2015

Trump is dominating the Republican presidential race with his controversial immigration proposals, which including building a wall along the U.S.-Mexican border, revoking citizenship of babies born in the U.S. to undocumented parents and deporting undocumented immigrants.

Read More