Gaza militants vow wave of attacks against Israel

Palestinian militant groups have joined forces to step up attacks against Israel, possibly including suicide bombings, the Hamas Islamist faction said on Thursday, after Palestinian and Israeli leaders launched direct peace negotiations in Washington. 

A spokesman for Hamas, which controls the Gaza Strip, said some 13 militant groups had joined forces to launch "more effective attacks" against Israel.

Asked if this included suicide bombings, he said: "All options are open."