sed block comment out

Block to comment out - cat xxx:
<Location /123>
ich
bin
text
</Location>

#-----------------------------------------

Script with error:

#!/bin/bash

loc="/123"
sed -i "/<Location $loc>/,/<\/Location>/s/^/#/" xxx

sed -i "\:<Location $loc>:,:</Location>:s:^:#:" xxx

#-----------------------------------------

Working Script:

#!/bin/bash

loc="/123"
sed "\:<Location $loc>:,\:</Location>:s:^:#:" xxx

# The second \ after the , was missing.