With further technical developments, the capacity of the interconnector will reach 7 billion cubic meters in both directions, Szijjártó said.

The interconnector, which started commercial operation in 2015, has an annual firm transmission capacity of 4.5 bln cubic meters from Slovakia to Hungary and interruptible capacity of 1.8 bln cubic meters in reverse mode.

Szijjártó said the boosted capacity would raise both countriesʼ energy security if there is a prolonged interruption in deliveries of Russian gas via Ukraine.

Moscow and Kiev are still negotiating a gas transit agreement to replace one which expires at the end of this year.