North Korean state media has reported that the country's leader, Kim Jong-un, has made his first public appearance since speculation about his health began last month.

According to the Korean Central News Agency Mr Kim cut the ribbon at the opening of a fertiliser factory.

Mr Kim "attended the ceremony" on Friday and "all the participants broke into thunderous cheers of 'hurrah!'" when he appeared, KCNA said.

The North Korean leader had not made a public appearance since presiding over a Workers' Party politburo meeting on 11 April.

The following day state media reported on him inspecting fighter jets at an air defence unit.

Rumours and speculation over Mr Kim's health began after he did not appear in public at a key state holiday on 15 April.

Earlier this week, South Korea's minister for North Korean affairs said Mr Kim may have missed the event because of concerns over the coronavirus, not because he is ill. 

His absence from public ceremonies on the birth anniversary of his grandfather and founder of the country, Kim Il-sung, was unprecedented. 

South Korean officials emphasised that they had detected no unusual movements in North Korea and cautioned against reports that Mr Kim may be ill.