U.S. job growth unexpectedly softened in April from the prior month, suggesting that difficulty attracting workers is slowing momentum in the labor market. Payrolls increased 266,000 after a downwardly revised 770,000 March increase, according to a Labor Department report Friday that fell well short of projections. Economists in a Bloomberg survey projected a 1 million hiring surge in April. The unemployment rate edged up to 6.1%, though the labor-force participation rate also increased.