Tributes from around the world are pouring in as people honor Senator John McCain’s dedication to public service.

Pennsylvania Senator Bob Casey reacted to Senator McCain’s death by releasing the following statement:

“John McCain was a patriot who served our nation with honor and distinction as a Navy pilot and public official. Today, we come together to mourn his loss, to express gratitude for the sacrifices he made for America and to extend our condolences to his family. As a servicemember, he experienced the horrors of war and captivity and still returned with a desire to continue serving our nation.

Throughout his time in the House of Representatives and more than 30 years in the Senate, John McCain was a tireless fighter for his principles and a champion of U.S. servicemembers. We have all benefited from Senator McCain’s lifetime of service. My thoughts and prayers are with his family during this difficult time.”

U.S. Senator Pat Toomey also reacted to the news and issued this statement:

“Today is a sad day for the Senate and America. Senator John McCain was a hero and one of our nation’s greatest patriots.

But most of all Senator McCain was a fighter. He fought for his country in Vietnam. He fought for his brothers in arms while being held as prisoners of war. And for more than thirty years, Senator McCain fought for Arizonans in the Senate. Most importantly, Senator McCain was not afraid to fight for what he thought was right, even when it was unpopular.

Senator McCain led a life that should be admired and respected by all Americans. I am proud to have called him a friend. Kris and I send our deepest sympathies to Cindy and the entire McCain family.”

Senator McCain died Saturday afternoon after a battle with an aggressive form of brain cancer.

He was 81 years old.