Vice President Joe Biden speaks at The Harris Center at Grinnell College in Grinnell on Tuesday, September 18, 2012. Biden also campaigned in Ottumwa earlier in the day. (Cliff Jette/The Gazette-KCRG TV9)

CEDAR RAPIDS — Vice President Joe Biden will campaign in Iowa next Thursday, though the exact location is still a mystery

The Obama for America campaign said the Vice President will speak at a grassroots event but said all other details with the event will be released later.

This visit will be Biden’s third to Iowa in about a month.  He joined his wife with the President and Michelle Obama in Iowa City for a rally September 7th and took a two-day tour of southeast Iowa on September 17 and 18.

Biden’s visit will come just days after a two-day stop by Republican vice presidential candidate Paul Ryan.  He is scheduled to hold a rally at Loras College in Dubuque on Monday then make campaign stops in Clinton, Muscatine and Burlington on Tuesday.