US Secretary of State Rex Tillerson and South Korea’s foreign minister agreed to consider tougher sanctions against North Korea following the North’s launch of a ballistic missile that flew over Japan on Tuesday, South Korea said.

Yoon Young-chan, a spokesman for the presidential Blue House in Seoul, told a briefing that South Korean fighter jets conducted bombing drills at a firing exercise ground after Pyongyang’s latest missile launch.

Separately, the South’s Yonhap news agency cited an unidentified Blue House source as saying the US military was considering the deployment of strategic assets to the Korean peninsula.