A suspected Palestinian suicide bomber has killed himself and two other people at an Israeli army checkpoint in the occupied West Bank. Israeli officials say the man detonated an explosive belt when soldiers tried to search him. An Israeli and two Palestinians also died in the blast.There are both Israeli and Palestinians among at least eight people reported injured. The incident occurred at a checkpoint between two Jewish settlements near the northern West Bank town of Tulkarm. It comes a day after Israel shelled the Gaza Strip to enforce a new “no-go zone” designed to prevent militants firing rockets. A military source says the roadblock had been set up in response to intelligence warnings that a bomber was on his way to Israel. Palestinian militant groups have vowed to carry out suicide attacks to avenge Israeli raids in the West Bank and strikes into the Gaza Strip. A shaky 10-month-old truce by militants is due to expire on Saturday. Growing violence has put peacemaking hopes on hold and could influence forthcoming elections on both sides.