Door is strong

A sizzle from the direction of the hatch through which they’d first entered turned all their heads. The hatch was reddening with heat, at first a small circle, but expanding.

They were cutting their way in.

Isval cursed.

The circle expanded. Smoke poured off the door as whatever tool they were using to cut started to slag the metal.

“Nothing should be able to cut through that door,” Eshgo said.

- Lords of the Sith, Chapter Eight, Page 183