The U.S. is preparing new penalties against North Korea after determining that Kim Jong Un’s regime used a pair of recent missile launches to test systems for a new ICBM project under development.

The restrictions would aim to further block North Korea’s purchase of foreign technologies, a senior Biden Administration official told reporters Thursday, without providing more details.

The U.S. is also ordering intensified intelligence surveillance and reconnaissance collection activities in the Yellow Sea and is enhancing ballistic missile defense forces in the region following the assessment, according to the official.