A Russian government jet known to transport top officials made a brief visit to North Korea from Thursday to Friday, aviation data shows, hinting at a possible high-level visit to Pyongyang a week before an expected military parade.

A Tupolov Tu-204-300 aircraft (RA-64058) operated by Russia’s Special Flight Squadron Rossiya took off from Moscow shortly before midnight (Russian time) on Wednesday and arrived in Pyongyang around 1 p.m. local time the following day, according to the flight tracking service Flightradar24.

The jet remained in the North Korean capital for a day before embarking on its return journey around 1 p.m.