Opponents of Republican presidential candidate Donald Trump attacked and injured several police officers and damaged a building during a campaign event in New Mexico. Protestors threw rocks, plastic bottles and other items at police officers outside the convention center in Albuquerque. The police returned with pepper spray and smoke grenades. Police said several officers were injured and at least one person was arrested on Tuesday evening. Trump was interrupted many times during his speech inside the convention center. Protestors shouted at him and held signs criticizing him. Thousands of Trump supporters applauded loudly when he insulted the protestors and told security officers to remove them. Doug Antoon is an attorney in Albuquerque. He said rocks smashed the convention center’s windows as he was leaving the event. He said, “This was not a protest -- this was a riot.” He said the protestors were members of “hate groups.” It was the first campaign event for Trump in New Mexico.