Fatah Party spokesman said on Friday the movement was suspending coalition talks with the rival Hamas movement to protest a flare-up in factional fighting, during which six men, thought to be Fatah operatives by Hamas gunmen, were shot to death.
"Fatah will not go to dialogue with killers," said Maher Mekdad, Fatah's spokesman in the Gaza Strip.
However, a top Fatah negotiator said he had not been informed of any decision to suspend the talks aimed at establishing a national unity government that could help end international sanctions against the Hamas-led Palestinian government.
Ibrahim Abu Naja, who heads Fatah's delegation to the talks, said "there are fears over the dialogue" but that he expected contacts to resume on Sunday.
AP contributed to this report