Deputy fin min Spahn talking to Deutschlandfunk,

"A so-called haircut is not legal, where you give up some debt ... but under the term debt relief you can also talk about extending maturities, having a period without making interest payments or redemption payments and we can talk about that, we have always said that"

Spahn also played down any differences within the German government on a draft agreement between Greece and its creditors, saying the Berlin government was "pulling together" in getting a deal with Greece that fulfilled certain conditions.

Reuters has more here