A big construction company embroiled in Brazil’s sprawling corruption scandal on Thursday showed off its legacy projects for next month’s Olympics in Rio de Janeiro.

Odebrecht is involved in several transportation projects, including renovations to the suburban train system that stops at key Olympic venues, a subway extension and a light rail in the long-derelict port region. The company is also helping make over Rio’s port area.

During the press tour, company executives declined to address questions about corruption but suggested the Olympic legacy projects were clean.

Prosecutors in a corruption investigation that started at state-run oil giant Petrobras say graft was so deeply rooted at Odebrecht that the company had a department to disburse bribes. The scandal has ensnared several top politicians and businessmen the last two years.