The exchange of hostages for Palestinian prisoners held in Israel appeared likely to go ahead, despite Israeli anger over Hamas’s handover of a misidentified body.

DNA testing had found that remains returned a day earlier purportedly of Ms. Bibas, a dead Israeli hostage, were in fact not hers, stirring outrage in Israel.

The legal onslaught on Moscow’s second-largest airport has been seen as part of the Kremlin’s wartime drive to seize control of key assets still in private hands.

President Trump on Friday said the Ukrainian president had been negotiating “with no cards” and did not need to participate in all the diplomatic meetings to end the war.

Less than 24 hours after Israel found that remains delivered by Hamas did not belong to Ms. Bibas, a slain Israeli hostage, the militant group said it had returned another body.

Earlier this month, the president said he favored taking control of Gaza and displacing the Palestinian population of the devastated seaside enclave. But Egypt and Jordan flatly rejected cooperating.

The police said they had detained a suspect in the assault, which occurred among the labyrinth of concrete slabs at one of the German capital’s most sacrosanct sites.

Hamas said it had returned the bodies of Shiri Bibas and her two sons. The Israeli military announced that the boys were murdered in Gaza and that Ms. Bibas’s body was that of someone else.

Moscow’s forces are three miles from Dnipropetrovsk, a province they have never invaded. If they cross in, the advance would be a morale blow to Ukraine and complicate any territorial negotiations.