rtokens: It was not immediately clear who was behind the blast .
pos: NNP POS NN VBD VBG IN DT NN IN DT NN IN DT NN CC VBD JJ IN DT NN .
tokens: Gaulieder 's family was sleeping in a bedroom at the back of the house and were unharmed by the blast .
ltokens: " This was an act of terrorism and now I fear not only for my own life , but also of that of my wife and children , " he told TASR .