(S (S (S (BASENP (DT A) (NN suicide) (NN bomber)) (VP (VP (VP (VP (VBD killed) (NP (QP (ADVP (IN at) (JJS least)) (NN one)) (NN person))) (CC and) (VP (VBD injured) (BASENP (NN five)))) (PP (IN at) (NP (BASENP (DT a) (NN police) (NN checkpoint)) (PP (IN in) (BASENP (JJ southern) (NNP Russia)))))) (PP (IN on) (BASENP (NNP Friday))))) (COMMA ,) (S (BASENP (JJ national) (NN news) (NNS agencies)) (VP (VBD reported)))) (PERIOD .))