World leaders have joined together to condemn the assassination attempt on former U.S. President Donald Trump over the weekend. Trump was hit in the ear at a campaign rally in Butler, Pennsylvania, on Saturday. The suspected shooter, identified by the FBI as 20-year Thomas Matthew Crooks, was swiftly killed by Secret Service agents at the scene. A bystander was also killed, while two other spectators were critically injured. Canadian Prime Minister Justin Trudeau said he was "sickened by the shooting" and sent his thoughts to Trump and his fellow Americans. European leaders from G-20 countries such as Germany, France, Italy, extended their concern and best wishe