I can't see a reason why you would want to go there at the moment. They're actually empty.

[Though, he hadn't checked in the last hour. Archer had no reason to go there twice, so he left it all at that.

Turning on his heel, Archer moved aside as one zombie fell away, stumbling after Asami's first few shots. He raised his right hand up and projected the sword 'Durandal', a holy blade. He gripped it and swung it down, not only cleaving one undead from shoulder to hip, but it burned and turned to dust from the light radiating from the blade's steel.]

You'll be better off heading to the surface with the ships.