Russia is hit by second huge train explosion as Ukraine 'moves to block munitions supplied by Kim Jong Un'

A second oil train exploded in Buryatia, deep inside Russia, in an evident Ukrainian secret services bid to block munitions from North Korea.

Earlier a train exploded inside a nine-mile-long tunnel, the longest in Russia.

The line is used for munitions from North Korea to supply Vladimir Putin's invading forces in Ukraine, according to InformNapalm channel.

The channel added: 'The explosion incident allegedly occurred on the Itikit-Okushikan section of the East Siberian Railway in the Northern Railway Tunnel.

'It is located on the BAM (Baikal-Amur Mainline) and receives military supplies from the DPRK (North Korea).'

Kim Jong-un has supplied Putin with vast supplies of artillery shells and other munitions after the pair met in Vladivostok in September.

It is also on the main line for imports from China, said reports.

Dramatic footage from Russian news sites shows the carnage after the second explosion some 3,000 miles from the Ukrainian border in Siberia.

Ukrainian security sources had claimed the SBU secret service responsibility for the Severomuysky Tunnel explosion on Thursday.

The second explosion on another train was reported 'in the same area'.

'Four tanker wagons from the train burned out, two more were damaged by fire,' reported Baza media outlet.

Fuel spread over an area of 1,600 square feet, it was stated.

The report said investigators were treating the explosions as 'sabotage' and had opened a criminal case into 'terrorist' attacks.

Bombs placed on the tracks are suspected.

The tunnel remains blocked from the first explosion which appears to have caused massive damage.

One account said the train comprised 50 tanker wagons - 41 with diesel and three with aviation fuel.

'As a result of the explosion, tanker wagon 16 at the head of the train burned out,' reported Baza.

Holes were found in two more tankers.

' After the explosion, it was possible to remove 14 tanks, but further transportation of the wagons is not yet possible.

'The explosion seriously damaged the rails, and the leaked fuel flooded them….

'Later, another train was blown up in the same area.'

A leaked internal email from Russian Railways stated: 'Attention EVERYONE!!!

'There was a terrorist attack in the Severomuysky tunnel!!!

'There are signs of explosions on the tankers….

'High alert mode has been introduced!!! Extra vigilance!!! Instruct all the employees!!!'

Russia initially claimed the tunnel explosion was caused by a 'short circuit' but now appears to accept it was a sabotage attack.

Last month Lt-Gen Kyrylo Budanov, Ukraine's military intelligence chief, said rockets in Kim's arsenal are suitable for the Grad anti-aircraft missile defence system, and some Russian tanks.

North Korea is capable of producing a significant number of artillery shells, since, unlike Russia, the Pyongyang regime has preserved facilities for serial weapons production.

According to Ukrainian intelligence, Russian military plants can satisfy seven per cent of the Russian army's needs for artillery shells.

'It's a question of how much the Koreans will be able to transfer quickly,' said Budanov.