I attended office vs I attended to office

Some examples from the web:

• It is not the first time a Commission President has attended a G8 meeting, or that a Prime Minister and President-in-Office has attended a G8 or G7 meeting.
• Meanwhile, the conference for public peace was called by No Shinyoung, the Prime Minister where Jung Hoyoung, the Home Minister and Suh Dongbum the president of the Public Prosecutors office attended to discuss recent...
• I attended a soldier's memorial service and afterwards I couldn't go to my office.
• The only reason I attended your little show is because I am a patron of the arts, and I resent being dragged into this office.
• I attended all your Berlin lectures.
• At a commissioning ceremony that Francis and I attended.
• I attended when they rang the emergency bell.
• I attended a spring concert at her school.
• Fitz and I attended four inaugural balls.
• There were a great many at the school I attended.
• I attended a meeting this afternoon with some Israeli citizens talking about their aspirations for peace.
• I attended to the man who was injured by your wife.
• I attended the conference on organised crime in Dublin before Christmas, it was excellent and the Irish showed great leadership.
• A parade I attended as a child.
• I attended the party with the intention of taking some pictures.
• I attended the Helsinki European Council and was present when these issues were debated.
• I attended a Tony Robbins event by the airport last year, and...
• I attended anger management therapy, but it just made me angry.
• Not even when I attended Donald Trump Jr.
• Your father and I attended his funeral six months ago.

Some examples from the web:

• Meanwhile, the conference for public peace was called by No Shinyoung, the Prime Minister where Jung Hoyoung, the Home Minister and Suh Dongbum the president of the Public Prosecutors office attended to discuss recent...
• It is not the first time a Commission President has attended a G8 meeting, or that a Prime Minister and President-in-Office has attended a G8 or G7 meeting.
• I attended to the man who was injured by your wife.
• I attended to him myself, Miss.
• So I left Mr. Crane on his own while I attended to this company business.
• I was accepted to Pepperdine University, and I came back to the same school that I attended to be a special ed assistant.
• I attended a soldier's memorial service and afterwards I couldn't go to my office.
• The only reason I attended your little show is because I am a patron of the arts, and I resent being dragged into this office.
• I trust that this matter, which the President-in-Office knows something about as it affects the country of which he is Prime Minister, will be attended to.
• I attended all your Berlin lectures.
• At a commissioning ceremony that Francis and I attended.
• I attended when they rang the emergency bell.
• He is attended to as promised.
• I attended a spring concert at her school.
• Fitz and I attended four inaugural balls.
• There were a great many at the school I attended.
• I attended a meeting this afternoon with some Israeli citizens talking about their aspirations for peace.
• I attended the conference on organised crime in Dublin before Christmas, it was excellent and the Irish showed great leadership.
• A parade I attended as a child.
• I attended the party with the intention of taking some pictures.