U.S. President Donald Trump has commented on the recent explosion at a Russian nuclear testing ground near Arkhangelsk.

"The United States is learning much from the failed missile explosion in Russia. We have similar, though more advanced, technology. The Russian “Skyfall” explosion has people worried about the air around the facility, and far beyond. Not good!" Trump tweeted on Monday, Aug 12.

It should be noted that "Skyfall" is a NATO codename for the Russian missile "Burevestnik".

As UNIAN reported earlier, on Aug 8, at a testing ground 100 km from Arkhangelsk and just 40 km from Severodvinsk, an explosion occurred.

The blast took lives of several nuclear scientists and provoked a radiation spike in the area.

The Dvinsk Bay area was closed for navigation for a 2-month period.