WASHINGTON — A House committee will vote on whether to issue a subpoena to the Veterans Affairs Department demanding the agency turn over documents that could explain how the cost of a Denver-area VA hospital ballooned to almost $1.7 billion, nearly triple earlier estimates.

The Veterans Affairs Committee scheduled a vote for Wednesday on a subpoena for documents gathered by a VA internal inquiry called an administrative investigation board.

The VA gave Congress a summary of the findings but not the supporting documents, despite repeated requests from lawmakers. The summary hasn’t been made public, and the VA hasn’t responded to an open records request from The Associated Press to release it.

Deputy VA Secretary Sloan Gibson has said making it public could have a chilling effect on future internal investigations.