GAZA CITY, Gaza Strip - A powerful blast went off at the house of a senior Islamic Jihad activist Friday, killing him and five others, medics and a spokesman for the group said. At least 40 people were hurt, including nine who were in critical condition, Health Ministry official Moawiya Hassanain said. Witnesses said the three-story home of Ayman Atallah Fayed was flattened by the blast, and that six nearby homes were badly damaged. Islamic Jihad claimed Israeli warplanes hit the house in an airstrike, but Hamas police said the cause of the blast was not clear. Islamic Jihad said...