Search for any signs of survivors

How do you complete "Search for any signs of survivors"?

This is step 2 of 4 in A Warm Place To Rest, given by Apollo. It is completed on Buried City. The exact location is marked on the Buried City map.

• A Warm Place To Rest
• Buried City

What are the other objectives in A Warm Place To Rest?

A Warm Place To Rest has 4 objectives in total: Locate the Abandoned Highway Camp, Search for any signs of survivors, Follow the red markers and Inspect the grave.