They're dismantling the labs and trying to sneak them out, including the nuke lab at Mariupol.

Kylie Atwood
@kylieatwood
Sec Blinken tells @fpleitgenCNN that it “makes no sense” for Russia to demand inspecting every Ukrainian ships leaving the Ukrainian ports. Also says Ukraine needs assurances that their ports would be safe from Russian ships when asked abt Ukraine de-mining waters around ports.

https://twitter.com/kylieatwood/status/1540375851954569222