Two Hamas men were killed Thursday in an explosion at a Hamas training base in the central Gaza Strip, Palestinian officials said. Hamas blamed Israel for the blast, which it said was caused by an air strike. Hamas security men kept photographers and TV cameramen away from the scene. Earlier, Palestinian security officials claimed that IDF troops had shot dead a Palestinian near central Gaza's border with Israel. They said the man, a 60-year-old farmer, was shot as he rode a donkey to his fields, east of the town of Khan Yunis. The IDF denied involvement in both incidents. Meanwhile, Palestinians detonated a bomb next to IDF soldiers who were patrolling along the security fence in the central Gaza Strip. There were no casualties or damage in the attack and it was initially unclear whether there was any connection between the two incidents.