Kim Yo Jong, a senior official in North Korea's ruling Workers' Party and the sister of DPRK leader Kim Jong Un, lashed out at "foolish" South Korea for criticizing the North's military drills and missile tests over the weekend, the official Korea Central News Agency (KCNA) reported on Tuesday.

In her statement, Kim Yo Jong called out South Korea's Blue House, known in Korean as Cheongwadae, for suggesting that the North's drills and tests -- the country's first military exercises of the year -- were "not helpful" for reducing tensions on the peninsula.