Security forces loyal to Palestinian Islamist movement Hamas man a checkpoint and stop vehicles for checks in Khan Younis in the southern Gaza Strip on August 28, 2019. - The Gaza Strip was in a "state of alert" on Wednesday, August 28 after explosions killed several policemen in the Palestinian enclave the previous night. Witnesses told that both bombings were suicide attacks, A source familiar said a Salafist movement in Gaza that sympathizes with Islamic State group jihadists was suspected. Photo by Ismael Mohamad/UPI.