Gathering the mortal remains of the martyrs
Question

                What is the ruling on gathering the mortal remains of the martyrs?
Praise be to Allah. 
          The mortal remains of the martyrs are like those of other 
          people, the mortal remains of each martyr should be buried in a grave 
          of his own, unless it is too difficult to bury each one on his own, 
          because there are too many dead owing to disease, killing etc. (In that 
          case) it is OK to bury two or three in one grave, and the one who was 
          best in religious commitment should be placed closest to the qiblah, 
          as the Prophet 
          
          (peace and blessings of Allaah be upon him) did with those who were 
          killed at Uhud. 
 
          And Allaah is the Source of strength. May Allaah bless 
          our Prophet Muhammad and his family and companions, and grant them peace.