A North Korean cargo ship has entered the Incheon Port in South Korea, a sign that trade between the rival countries is continuing despite naval troubles last week.

The ship, carrying 1,750t of silica, departed from a North Korean port last Thursday, following a naval skirmish between the two countries, according to AFP.

Other North Korean ships have passed through South Korea and some South Korean ships have sailed to North Korean ports following the skirmish, according to the Unification Ministry, which handles inter-Korean affairs.

Two more cargo ships from North Korea are expected to arrive at the port at the end of the week.