The boy, who was in foster care, was being transported between a supervised visit and day care, his aunt said. State lawmakers said they were seeking answers and the police were investigating.

Facing growing pressure amid nationwide protests, President Volodymyr Zelensky of Ukraine backtracked on controversial legislation that would have weakened the country’s independent anticorruption institutions. Katrin Bennhold, a senior writer, and Marc Santora, an international news editor for The New York Times, explain the events that led to the reversal.

Jordan and the United Arab Emirates were expected to begin airdrops in the coming days, but experts warned that the bulk of necessary aid could come only by land.