It is still unclear what type of robot North Korea fired. But according to the South Korean military, the projectiles should be fired from North Korea's east coast.
North Korea has recently intensified its robot testing. According to the country's dictator Kim Jong-Un, the tests are a warning to the United States and South Korea, which carried out joint military exercises.
US President Donald Trump has not yet commented on the robot tests of the night, but he has previously said that North Korea has fired short-range robots that pose no threat to the US.
"These are short-range robots and many other countries are also testing such robots," Donald Trump said in a statement to Reuters in early August.