APTOPIX GOP 2016 Cleveland

A law enforcement officer tries to extinguish a burning American flag, Wednesday, July 20, 2016, in Cleveland, during the third day of the Republican convention. (AP Photo/John Minchillo)

(John Minchillo)

Cleveland police said a man lit himself and others on fire during a protest in Ohio on Wednesday.

Police said the man caught fire while trying to burn a flag. Then the man accidentally caught others on fire. No injuries were reported after the blaze was extinguished.

Most of the demonstrators are there to oppose Republican presidential nominee Donald Trump during the Republican National Convention, which is being held in Cleveland.