Services for Sen. Edward Kennedy will be Saturday morning at a Boston church before his burial in Arlington National Cemetery outside Washington, his office announced Wednesday.

President Obama, who called Kennedy an "extraordinary leader," will deliver a eulogy at the funeral, according to several sources.

Before the funeral, Kennedy's body will lie in repose Thursday afternoon and Friday in the Smith Center at the John F. Kennedy Presidential Library in Boston, said the source, who once worked closely with Kennedy's office. A memorial service will be held Friday evening at the Smith Center, the source said.