HONOLULU — Hawaii lawmakers say they plan to hold a special session this summer to discuss funding for Honolulu’s troubled rail line.

Senate President Ronald Kouchi and House Speaker Scott Saiki said in a news release Monday they sent the Federal Transit Administration a letter about their intentions.

They expect to hold the session in July or August, but have not set specific dates.

The federal government has been waiting for an updated financial plan and could demand the return of hundreds of millions of federal dollars already spent on the rail line.

The rail project faces a funding shortfall of as much as $3 billion. The state Legislature ended its regular session in May without agreeing on a way to fully fund the project, which could cost up to $10 billion.