Samus looks over her shoulder at Shepard when the commander steps in with her own fire power, tilting her head at her curiously.

"I can't pinpoint where their numbers are coming from. They're thinning out but they won't stop coming... If they persist past the Thirteenth Hour I'm afraid they could take over the city in a matter of days." She has her suspicions that these creatures won't last that long, but she's not going to take her chances.