Boryspil International Airport, Ukraine's largest, has been closed since Russia began its invasion last year.

The firm has signed two agreements with Ukrainian officials related to project management, cost estimating standards and gaining investors for the country's plans to rebuild infrastructure damaged by the Russian invasion.

UPDATE: Russians now occupy Zaporizhzhia faciity, but fire caused by shelling is out with no reactor damage or elevated radioactivity as yet, although power output remains reduced, Ukraine officials said, in latest big assault on the country's infrastructure from Putin military invasion.