Israel unleashed four air strikes on Hamas targets a few minutes apart Saturday, killing at least one Hamas activist and wounding four, doctors and security officials reported. The first strike hit a Hamas installation in Gaza City's Zeitoun neighborhood, and doctors reported at least one dead. Hamas said two of its members were killed. Another air strike hit a Hamas training camp on the outskirts of Shati refugee camp. There were no reports of casualties. Minutes later, a third strike hit a Hamas installation in the southern town of Rafah, security officials said. The area was hit a few days before, and the officials didn't know of any casualties. A fourth strike targeted a Hamas training base in a demolished Jewish settlement near the southern town of Khan Younis, the Associated Press reported.