MOSCOW -- The World Anti-Doping Agency has handed over more than 100,000 computer files on Russia to the body investigating drug cases in track and field.

The files, originally from the Moscow drug-testing laboratory, could reveal more past doping offences by top Russian athletes, even if they were originally covered up.

The handover comes as Russia pushes to have its track team fully reinstated in time for the track and field world championships in Qatar in September and October.

The Athletics Integrity Unit, which handles doping cases in track, says the archive contains around 110,000 files. WADA obtained the Moscow lab files and raw data from the drug-testing equipment in January after much wrangling with Russian authorities and spent months piecing it together.