North Korea has held a launching ceremony for a new submarine it says is capable of tactical nuclear attacks, a move that could increase its ability to carry out atomic strikes in the region.

The country’s state media released photos Friday of a ceremony for the vessel attended by leader Kim Jong Un, who said he wanted to push forward with increasing his navy’s ability to use nuclear weapons.

The initial images showed the submarine likely has 10 tubes for missiles and is a modernized Soviet-designed Romeo Class boat, specialist publication Naval News said in an analysis.