North Korea fired two short-range projectiles, presumed to be Scud-type ballistic missiles, on Monday morning South Korean time, Seoul’s military leadership announced.

“North Korea fired two short-range missiles with a range of some 490 kilometers into the East Sea from its western port city of Nampo between 6:32 a.m. and 6:41 a.m. (KST) today,” the Joint Chiefs of Staff said in a press release.

North Korea’s firing of the missiles comes as joint U.S.-ROK military exercises, namely Key Resolve and Foal Eagle, started on Monday.

North Korea typically conducts missile launches like this during joint U.S.-ROK exercises, NK News director