Some 45 passengers have asked for medical help after a fire in the Moscow metro in on Wednesday morning, spokesman for the Moscow department of the Russian Emergency Situations Ministry Viktor Biryukov told Interfax.

"According to adjusted information, 45 people sought medical assistance, seven of them were hospitalized," Biryukov said.

The majority of people got carbon monoxide poisoning, he said.

It was reported earlier that a high-voltage cable caught fire in a tunnel between the Okhotny Ryad and Biblioteka Imeni Lenina stations of the Sokolnicheskaya (red) line of the Moscow metro at 8.30 a.m. Moscow time.

Some 4,500 passengers were evacuated from the Okhotny Ryad station. However, four trains with passengers are still in tunnels of the Sokolnicheskaya line.

The fire was extinguished at 9.05 a.m. Moscow time.