Iterate through XML nodes with Lua

I'm trying to iterate through all the 'FindMe' nodes but I'm struggling with the pattern matching. This is going to be used as a plugin in another piece of software so I'm trying to avoid using a parsing library.

Given the following xml

<?xml version="1.0" encoding="utf-8"?>
<NodeA>
    <NodeB>
        <FindMe attr="1">
            <NodeC attr="1" />
        </FindMe>
        <FindMe attr="2">
            <NodeC attr="2" />
        </FindMe>
    </NodeB>
</NodeA>

When I try this it only prints the last match

for k, _ in src:gmatch(".+(<FindMe .+</FindMe>).+") do
    print(k)
end

<FindMe attr="2">
    <NodeC attr="2" />
</FindMe>

When I try this it prints all the matching nodes as one result

for k, _ in src:gmatch('<FindMe.+>.+</FindMe>') do 
    print(k) 
end

<FindMe attr="1">
    <NodeC attr="1" />
</FindMe>
<FindMe attr="2">
    <NodeC attr="2" />
</FindMe>