The second most powerful general in Myanmar’s junta plans next week to visit Russia, a long-time arms supplier to the secretive regime, military officials said Wednesday.

Deputy Senior General Maung Aye is set to leave Monday for Russia, military officials said, declining to provide details of the trip.

Russia has been a long-time supplier of arms to Myanmar. It sold the country 10 MiG-29s fighter jets in 2001, according to Jane’s Defense Weekly.

In 2002 the military government said it was planning to build a nuclear research reactor and that it was negotiating with Russia over the facility.

But Moscow reportedly shelved the project in 2003 because the Yangon regime could not pay for it.