Hamas won’t enter into negotiations on further prisoner exchanges without a cessation of Israeli hostilities in Gaza, the Palestinian extremist group said on Sunday as the WHO sounded alarm over the catastrophic situation in the coastal strip. “Hamas reaffirms its stance not to conduct any negotiations to exchange prisoners unless the Zionist aggression against our people stops once and for all,” Hamas said, adding that this message had been passed on to all mediators involved. It comes as Qatar says it is currently in talks to mediate between Israel and Hamas to agree another humanitarian pau…