Indyk first met chief Palestinian negotiator Saeb Erakat in the West Bank city of Jericho, but no details of their talks were given.
Israeli officials did not respond to requests for information, but media reports said a new tripartite meeting could be held in the coming days.
The previous day's talks, held in a Jerusalem hotel, were "very difficult", the Palestinian source said, adding: "The gap... Is still wide."
State Department spokeswoman Jennifer Psaki said this week that Israeli and Palestinian negotiators are striving to reach an agreement to extend their peace talks beyond an April 29 deadline.
"Kerry keeps them going like a gambler in a casino who insists in putting his money on the roulette wheel, with the hope that the wheel will stop on his number at some point," Barnea wrote.
"He believed that he would reach a peace agreement; then he limited himself to a framework agreement; he later limited himself even further to an American proposal for a framework; and then just to ideas.
Washington is pushing for an extension, but the negotiations hit an impasse two weeks ago when Israel refused to release a group of Palestinian prisoners as agreed at last year's launch of the talks.
Under the agreement, Israel had committed to freeing 104 prisoners held since before the 1993 Oslo autonomy accords in four batches, but it cancelled the release of the last group of 26.
Among them are 14 Arab Israelis whom the Jewish state is refusing to set free.
Palestinian president Mahmud Abbas told Israeli opposition MPs visiting him in the West Bank city of Ramallah on Wednesday that if talks were extended, he would want the first three months "devoted to a serious discussion of borders", Haaretz newspaper reported.
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