Kim Jong Un’s extended trip to Vietnam for meetings with U.S. President Donald Trump this week has seen North Korean officials at home discouraged from drinking alcohol, a Pyongyang-based source told NK News on Tuesday.

The development follows two other sources telling NK News that North Korean citizens had refrained from drinking alcohol during Kim Jong Un’s visit to Beijing in January, citing the leader’s departure from the country as the reason.

“Local people are brought up to shield and protect the leader with their lives (and) while he is away, they can’t do that,” the Pyongyang-based person said