Former US president Donald Trump was rushed from the stage of a campaign rally with an apparent injury to his head after an incident possibly involving gun shots.
Televised images showed Trump with what appeared to be blood on his right ear and face being escorted from the stage by US Secret Service agents during a campaign stop in Butler County, Pennsylvania.
Trump managed to pump his fist while being rushed off the stage.
"President Trump thanks law enforcement and first responders for their quick action during this heinous act," his campaign said. "He is fine and is being checked out at a local medical facility. More details will follow."
Trump is scheduled to accept his formal nomination as the Republican candidate for president next week when the Republican Party holds its convention in Milwaukee, Wisconsin.
The White House said President Joe Biden was being briefed by the chief of the Secret Service and other officials on the incident at Trump's rally.